A flaw was found in the Linux kernel’s IP framework for transforming packets (XFRM subsystem). This issue may allow a malicious user with CAP_NET_ADMIN privileges to cause a 4 byte out-of-bounds read of XFRMA_MTIMER_THRESH when parsing netlink attributes, leading to potential leakage of sensitive heap data to userspace.

An update of the linux package has been released.

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2023:6583 advisory.

    The kernel packages contain the Linux kernel, the core of any Linux operating system.

    Security Fix(es):

    * kernel: net/sched: cls_u32 component reference counter leak if tcf_change_indev() fails (CVE-2023-3609)

    * kernel: net/sched: Use-after-free vulnerabilities in the net/sched classifiers: cls_fw, cls_u32 and     cls_route (CVE-2023-4128, CVE-2023-4206, CVE-2023-4207, CVE-2023-4208)

    * kernel: eBPF: insufficient stack type checks in dynptr (CVE-2023-39191)

    * Kernel: race when faulting a device private page in memory manager (CVE-2022-3523)

    * kernel: use-after-free in l1oip timer handlers (CVE-2022-3565)

    * kernel: Rate limit overflow messages in r8152 in intr_callback (CVE-2022-3594)

    * kernel: vmwgfx: use-after-free in vmw_cmd_res_check (CVE-2022-38457)

    * kernel: vmwgfx: use-after-free in vmw_execbuf_tie_context (CVE-2022-40133)

    * hw: Intel: Gather Data Sampling (GDS) side channel vulnerability (CVE-2022-40982)

    * kernel: Information leak in l2cap_parse_conf_req in net/bluetooth/l2cap_core.c (CVE-2022-42895)

    * kernel: x86/mm: Randomize per-cpu entry area (CVE-2023-0597)

    * kernel: HID: check empty report_list in hid_validate_values() (CVE-2023-1073)

    * kernel: sctp: fail if no bound addresses can be used for a given scope (CVE-2023-1074)

    * kernel: hid: Use After Free in asus_remove() (CVE-2023-1079)

    * kernel: hash collisions in the IPv6 connection lookup table (CVE-2023-1206)

    * kernel: ovl: fix use after free in struct ovl_aio_req (CVE-2023-1252)

    * Kernel: use-after-free in nfsd4_ssc_setup_dul in fs/nfsd/nfs4proc.c (CVE-2023-1652)

    * kernel: Use after free bug in btsdio_remove due to race condition (CVE-2023-1989)

    * kernel: fbcon: shift-out-of-bounds in fbcon_set_font() (CVE-2023-3161)

    * kernel: out-of-bounds access in relay_file_read (CVE-2023-3268)

    * kernel: xfrm: NULL pointer dereference in xfrm_update_ae_params() (CVE-2023-3772)

    * kernel: xfrm: out-of-bounds read of XFRMA_MTIMER_THRESH nlattr (CVE-2023-3773)

    * kernel: KVM: SEV-ES / SEV-SNP VMGEXIT double fetch vulnerability (CVE-2023-4155)

    * kernel: exFAT: stack overflow in exfat_get_uniname_from_ext_entry (CVE-2023-4273)

    * kernel: mpls: double free on sysctl allocation failure (CVE-2023-26545)

    * kernel: KVM: nVMX: missing consistency checks for CR0 and CR4 (CVE-2023-30456)

    * kernel: net: qcom/emac: race condition leading to use-after-free in emac_remove() (CVE-2023-33203)

    * kernel: vmwgfx: race condition leading to information disclosure vulnerability (CVE-2023-33951)

    * kernel: vmwgfx: double free within the handling of vmw_buffer_object objects (CVE-2023-33952)

    * kernel: r592: race condition leading to use-after-free in r592_remove() (CVE-2023-35825)

    * kernel: net/tls: tls_is_tx_ready() checked list_entry (CVE-2023-1075)

    * kernel: tap: tap_open(): correctly initialize socket uid (CVE-2023-1076)

    * kernel: missing mmap_lock in file_files_note that could possibly lead to a use after free in the     coredump code (CVE-2023-1249)

    * kernel: use-after-free bug in remove function xgene_hwmon_remove (CVE-2023-1855)

    * kernel: Use after free bug in r592_remove (CVE-2023-3141)

    * kernel: gfs2: NULL pointer dereference in gfs2_evict_inode() (CVE-2023-3212)

    * kernel: NULL pointer dereference due to missing kalloc() return value check in     shtp_cl_get_dma_send_buf() (CVE-2023-3358)

    * kernel: tap: tap_open(): correctly initialize socket uid next fix of i_uid to current_fsuid     (CVE-2023-4194)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

    Additional Changes:

    For detailed information on changes in this release, see the Red Hat Enterprise Linux 9.3 Release Notes     linked from the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 20.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-6549-5 advisory.

    It was discovered that the USB subsystem in the Linux kernel contained a race condition while handling     device descriptors in certain situations, leading to a out-of-bounds read vulnerability. A local attacker     could possibly use this to cause a denial of service (system crash). (CVE-2023-37453)

    Lin Ma discovered that the Netlink Transformation (XFRM) subsystem in the Linux kernel did not properly     initialize a policy data structure, leading to an out-of-bounds vulnerability. A local privileged attacker     could use this to cause a denial of service (system crash) or possibly expose sensitive information     (kernel memory). (CVE-2023-3773)

    Lucas Leong discovered that the netfilter subsystem in the Linux kernel did not properly validate some     attributes passed from userspace. A local attacker could use this to cause a denial of service (system     crash) or possibly expose sensitive information (kernel memory). (CVE-2023-39189)

    Sunjoo Park discovered that the netfilter subsystem in the Linux kernel did not properly validate u32     packets content, leading to an out-of-bounds read vulnerability. A local attacker could use this to cause     a denial of service (system crash) or possibly expose sensitive information. (CVE-2023-39192)

    Lucas Leong discovered that the netfilter subsystem in the Linux kernel did not properly validate SCTP     data, leading to an out-of-bounds read vulnerability. A local attacker could use this to cause a denial of     service (system crash) or possibly expose sensitive information. (CVE-2023-39193)

    Lucas Leong discovered that the Netlink Transformation (XFRM) subsystem in the Linux kernel did not     properly handle state filters, leading to an out- of-bounds read vulnerability. A privileged local     attacker could use this to cause a denial of service (system crash) or possibly expose sensitive     information. (CVE-2023-39194)

    It was discovered that a race condition existed in QXL virtual GPU driver in the Linux kernel, leading to     a use after free vulnerability. A local attacker could use this to cause a denial of service (system     crash) or possibly execute arbitrary code. (CVE-2023-39198)

    Kyle Zeng discovered that the IPv4 implementation in the Linux kernel did not properly handle socket     buffers (skb) when performing IP routing in certain circumstances, leading to a null pointer dereference     vulnerability. A privileged attacker could use this to cause a denial of service (system crash).
    (CVE-2023-42754)

    Jason Wang discovered that the virtio ring implementation in the Linux kernel did not properly handle iov     buffers in some situations. A local attacker in a guest VM could use this to cause a denial of service     (host system crash). (CVE-2023-5158)

    Alon Zahavi discovered that the NVMe-oF/TCP subsystem in the Linux kernel did not properly handle queue     initialization failures in certain situations, leading to a use-after-free vulnerability. A remote     attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.
    (CVE-2023-5178)

    Budimir Markovic discovered that the perf subsystem in the Linux kernel did not properly handle event     groups, leading to an out-of-bounds write vulnerability. A local attacker could use this to cause a denial     of service (system crash) or possibly execute arbitrary code. (CVE-2023-5717)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 22.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-6549-4 advisory.

    It was discovered that the USB subsystem in the Linux kernel contained a race condition while handling     device descriptors in certain situations, leading to a out-of-bounds read vulnerability. A local attacker     could possibly use this to cause a denial of service (system crash). (CVE-2023-37453)

    Lin Ma discovered that the Netlink Transformation (XFRM) subsystem in the Linux kernel did not properly     initialize a policy data structure, leading to an out-of-bounds vulnerability. A local privileged attacker     could use this to cause a denial of service (system crash) or possibly expose sensitive information     (kernel memory). (CVE-2023-3773)

    Lucas Leong discovered that the netfilter subsystem in the Linux kernel did not properly validate some     attributes passed from userspace. A local attacker could use this to cause a denial of service (system     crash) or possibly expose sensitive information (kernel memory). (CVE-2023-39189)

    Sunjoo Park discovered that the netfilter subsystem in the Linux kernel did not properly validate u32     packets content, leading to an out-of-bounds read vulnerability. A local attacker could use this to cause     a denial of service (system crash) or possibly expose sensitive information. (CVE-2023-39192)

    Lucas Leong discovered that the netfilter subsystem in the Linux kernel did not properly validate SCTP     data, leading to an out-of-bounds read vulnerability. A local attacker could use this to cause a denial of     service (system crash) or possibly expose sensitive information. (CVE-2023-39193)

    Lucas Leong discovered that the Netlink Transformation (XFRM) subsystem in the Linux kernel did not     properly handle state filters, leading to an out- of-bounds read vulnerability. A privileged local     attacker could use this to cause a denial of service (system crash) or possibly expose sensitive     information. (CVE-2023-39194)

    It was discovered that a race condition existed in QXL virtual GPU driver in the Linux kernel, leading to     a use after free vulnerability. A local attacker could use this to cause a denial of service (system     crash) or possibly execute arbitrary code. (CVE-2023-39198)

    Kyle Zeng discovered that the IPv4 implementation in the Linux kernel did not properly handle socket     buffers (skb) when performing IP routing in certain circumstances, leading to a null pointer dereference     vulnerability. A privileged attacker could use this to cause a denial of service (system crash).
    (CVE-2023-42754)

    Jason Wang discovered that the virtio ring implementation in the Linux kernel did not properly handle iov     buffers in some situations. A local attacker in a guest VM could use this to cause a denial of service     (host system crash). (CVE-2023-5158)

    Alon Zahavi discovered that the NVMe-oF/TCP subsystem in the Linux kernel did not properly handle queue     initialization failures in certain situations, leading to a use-after-free vulnerability. A remote     attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.
    (CVE-2023-5178)

    Budimir Markovic discovered that the perf subsystem in the Linux kernel did not properly handle event     groups, leading to an out-of-bounds write vulnerability. A local attacker could use this to cause a denial     of service (system crash) or possibly execute arbitrary code. (CVE-2023-5717)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 22.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-6534-3 advisory.

    It was discovered that the USB subsystem in the Linux kernel contained a race condition while handling     device descriptors in certain situations, leading to a out-of-bounds read vulnerability. A local attacker     could possibly use this to cause a denial of service (system crash). (CVE-2023-37453)

    Lin Ma discovered that the Netlink Transformation (XFRM) subsystem in the Linux kernel did not properly     initialize a policy data structure, leading to an out-of-bounds vulnerability. A local privileged attacker     could use this to cause a denial of service (system crash) or possibly expose sensitive information     (kernel memory). (CVE-2023-3773)

    Lucas Leong discovered that the netfilter subsystem in the Linux kernel did not properly validate some     attributes passed from userspace. A local attacker could use this to cause a denial of service (system     crash) or possibly expose sensitive information (kernel memory). (CVE-2023-39189)

    Sunjoo Park discovered that the netfilter subsystem in the Linux kernel did not properly validate u32     packets content, leading to an out-of-bounds read vulnerability. A local attacker could use this to cause     a denial of service (system crash) or possibly expose sensitive information. (CVE-2023-39192)

    Lucas Leong discovered that the netfilter subsystem in the Linux kernel did not properly validate SCTP     data, leading to an out-of-bounds read vulnerability. A local attacker could use this to cause a denial of     service (system crash) or possibly expose sensitive information. (CVE-2023-39193)

    Lucas Leong discovered that the Netlink Transformation (XFRM) subsystem in the Linux kernel did not     properly handle state filters, leading to an out- of-bounds read vulnerability. A privileged local     attacker could use this to cause a denial of service (system crash) or possibly expose sensitive     information. (CVE-2023-39194)

    It was discovered that a race condition existed in QXL virtual GPU driver in the Linux kernel, leading to     a use after free vulnerability. A local attacker could use this to cause a denial of service (system     crash) or possibly execute arbitrary code. (CVE-2023-39198)

    Kyle Zeng discovered that the IPv4 implementation in the Linux kernel did not properly handle socket     buffers (skb) when performing IP routing in certain circumstances, leading to a null pointer dereference     vulnerability. A privileged attacker could use this to cause a denial of service (system crash).
    (CVE-2023-42754)

    Jason Wang discovered that the virtio ring implementation in the Linux kernel did not properly handle iov     buffers in some situations. A local attacker in a guest VM could use this to cause a denial of service     (host system crash). (CVE-2023-5158)

    Alon Zahavi discovered that the NVMe-oF/TCP subsystem in the Linux kernel did not properly handle queue     initialization failures in certain situations, leading to a use-after-free vulnerability. A remote     attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.
    (CVE-2023-5178)

    Budimir Markovic discovered that the perf subsystem in the Linux kernel did not properly handle event     groups, leading to an out-of-bounds write vulnerability. A local attacker could use this to cause a denial     of service (system crash) or possibly execute arbitrary code. (CVE-2023-5717)

    It was discovered that the Microchip USB Ethernet driver in the Linux kernel contained a race condition     during device removal, leading to a use- after-free vulnerability. A physically proximate attacker could     use this to cause a denial of service (system crash). (CVE-2023-6039)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 20.04 LTS / 22.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-6549-3 advisory.

    It was discovered that the USB subsystem in the Linux kernel contained a race condition while handling     device descriptors in certain situations, leading to a out-of-bounds read vulnerability. A local attacker     could possibly use this to cause a denial of service (system crash). (CVE-2023-37453)

    Lin Ma discovered that the Netlink Transformation (XFRM) subsystem in the Linux kernel did not properly     initialize a policy data structure, leading to an out-of-bounds vulnerability. A local privileged attacker     could use this to cause a denial of service (system crash) or possibly expose sensitive information     (kernel memory). (CVE-2023-3773)

    Lucas Leong discovered that the netfilter subsystem in the Linux kernel did not properly validate some     attributes passed from userspace. A local attacker could use this to cause a denial of service (system     crash) or possibly expose sensitive information (kernel memory). (CVE-2023-39189)

    Sunjoo Park discovered that the netfilter subsystem in the Linux kernel did not properly validate u32     packets content, leading to an out-of-bounds read vulnerability. A local attacker could use this to cause     a denial of service (system crash) or possibly expose sensitive information. (CVE-2023-39192)

    Lucas Leong discovered that the netfilter subsystem in the Linux kernel did not properly validate SCTP     data, leading to an out-of-bounds read vulnerability. A local attacker could use this to cause a denial of     service (system crash) or possibly expose sensitive information. (CVE-2023-39193)

    Lucas Leong discovered that the Netlink Transformation (XFRM) subsystem in the Linux kernel did not     properly handle state filters, leading to an out- of-bounds read vulnerability. A privileged local     attacker could use this to cause a denial of service (system crash) or possibly expose sensitive     information. (CVE-2023-39194)

    It was discovered that a race condition existed in QXL virtual GPU driver in the Linux kernel, leading to     a use after free vulnerability. A local attacker could use this to cause a denial of service (system     crash) or possibly execute arbitrary code. (CVE-2023-39198)

    Kyle Zeng discovered that the IPv4 implementation in the Linux kernel did not properly handle socket     buffers (skb) when performing IP routing in certain circumstances, leading to a null pointer dereference     vulnerability. A privileged attacker could use this to cause a denial of service (system crash).
    (CVE-2023-42754)

    Jason Wang discovered that the virtio ring implementation in the Linux kernel did not properly handle iov     buffers in some situations. A local attacker in a guest VM could use this to cause a denial of service     (host system crash). (CVE-2023-5158)

    Alon Zahavi discovered that the NVMe-oF/TCP subsystem in the Linux kernel did not properly handle queue     initialization failures in certain situations, leading to a use-after-free vulnerability. A remote     attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.
    (CVE-2023-5178)

    Budimir Markovic discovered that the perf subsystem in the Linux kernel did not properly handle event     groups, leading to an out-of-bounds write vulnerability. A local attacker could use this to cause a denial     of service (system crash) or possibly execute arbitrary code. (CVE-2023-5717)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 23.04 host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-6534-2 advisory.

    It was discovered that the USB subsystem in the Linux kernel contained a race condition while handling     device descriptors in certain situations, leading to a out-of-bounds read vulnerability. A local attacker     could possibly use this to cause a denial of service (system crash). (CVE-2023-37453)

    Lin Ma discovered that the Netlink Transformation (XFRM) subsystem in the Linux kernel did not properly     initialize a policy data structure, leading to an out-of-bounds vulnerability. A local privileged attacker     could use this to cause a denial of service (system crash) or possibly expose sensitive information     (kernel memory). (CVE-2023-3773)

    Lucas Leong discovered that the netfilter subsystem in the Linux kernel did not properly validate some     attributes passed from userspace. A local attacker could use this to cause a denial of service (system     crash) or possibly expose sensitive information (kernel memory). (CVE-2023-39189)

    Sunjoo Park discovered that the netfilter subsystem in the Linux kernel did not properly validate u32     packets content, leading to an out-of-bounds read vulnerability. A local attacker could use this to cause     a denial of service (system crash) or possibly expose sensitive information. (CVE-2023-39192)

    Lucas Leong discovered that the netfilter subsystem in the Linux kernel did not properly validate SCTP     data, leading to an out-of-bounds read vulnerability. A local attacker could use this to cause a denial of     service (system crash) or possibly expose sensitive information. (CVE-2023-39193)

    Lucas Leong discovered that the Netlink Transformation (XFRM) subsystem in the Linux kernel did not     properly handle state filters, leading to an out- of-bounds read vulnerability. A privileged local     attacker could use this to cause a denial of service (system crash) or possibly expose sensitive     information. (CVE-2023-39194)

    It was discovered that a race condition existed in QXL virtual GPU driver in the Linux kernel, leading to     a use after free vulnerability. A local attacker could use this to cause a denial of service (system     crash) or possibly execute arbitrary code. (CVE-2023-39198)

    Kyle Zeng discovered that the IPv4 implementation in the Linux kernel did not properly handle socket     buffers (skb) when performing IP routing in certain circumstances, leading to a null pointer dereference     vulnerability. A privileged attacker could use this to cause a denial of service (system crash).
    (CVE-2023-42754)

    Jason Wang discovered that the virtio ring implementation in the Linux kernel did not properly handle iov     buffers in some situations. A local attacker in a guest VM could use this to cause a denial of service     (host system crash). (CVE-2023-5158)

    Alon Zahavi discovered that the NVMe-oF/TCP subsystem in the Linux kernel did not properly handle queue     initialization failures in certain situations, leading to a use-after-free vulnerability. A remote     attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.
    (CVE-2023-5178)

    Budimir Markovic discovered that the perf subsystem in the Linux kernel did not properly handle event     groups, leading to an out-of-bounds write vulnerability. A local attacker could use this to cause a denial     of service (system crash) or possibly execute arbitrary code. (CVE-2023-5717)

    It was discovered that the Microchip USB Ethernet driver in the Linux kernel contained a race condition     during device removal, leading to a use- after-free vulnerability. A physically proximate attacker could     use this to cause a denial of service (system crash). (CVE-2023-6039)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 20.04 LTS / 22.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-6549-2 advisory.

    It was discovered that the USB subsystem in the Linux kernel contained a race condition while handling     device descriptors in certain situations, leading to a out-of-bounds read vulnerability. A local attacker     could possibly use this to cause a denial of service (system crash). (CVE-2023-37453)

    Lin Ma discovered that the Netlink Transformation (XFRM) subsystem in the Linux kernel did not properly     initialize a policy data structure, leading to an out-of-bounds vulnerability. A local privileged attacker     could use this to cause a denial of service (system crash) or possibly expose sensitive information     (kernel memory). (CVE-2023-3773)

    Lucas Leong discovered that the netfilter subsystem in the Linux kernel did not properly validate some     attributes passed from userspace. A local attacker could use this to cause a denial of service (system     crash) or possibly expose sensitive information (kernel memory). (CVE-2023-39189)

    Sunjoo Park discovered that the netfilter subsystem in the Linux kernel did not properly validate u32     packets content, leading to an out-of-bounds read vulnerability. A local attacker could use this to cause     a denial of service (system crash) or possibly expose sensitive information. (CVE-2023-39192)

    Lucas Leong discovered that the netfilter subsystem in the Linux kernel did not properly validate SCTP     data, leading to an out-of-bounds read vulnerability. A local attacker could use this to cause a denial of     service (system crash) or possibly expose sensitive information. (CVE-2023-39193)

    Lucas Leong discovered that the Netlink Transformation (XFRM) subsystem in the Linux kernel did not     properly handle state filters, leading to an out- of-bounds read vulnerability. A privileged local     attacker could use this to cause a denial of service (system crash) or possibly expose sensitive     information. (CVE-2023-39194)

    It was discovered that a race condition existed in QXL virtual GPU driver in the Linux kernel, leading to     a use after free vulnerability. A local attacker could use this to cause a denial of service (system     crash) or possibly execute arbitrary code. (CVE-2023-39198)

    Kyle Zeng discovered that the IPv4 implementation in the Linux kernel did not properly handle socket     buffers (skb) when performing IP routing in certain circumstances, leading to a null pointer dereference     vulnerability. A privileged attacker could use this to cause a denial of service (system crash).
    (CVE-2023-42754)

    Jason Wang discovered that the virtio ring implementation in the Linux kernel did not properly handle iov     buffers in some situations. A local attacker in a guest VM could use this to cause a denial of service     (host system crash). (CVE-2023-5158)

    Alon Zahavi discovered that the NVMe-oF/TCP subsystem in the Linux kernel did not properly handle queue     initialization failures in certain situations, leading to a use-after-free vulnerability. A remote     attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.
    (CVE-2023-5178)

    Budimir Markovic discovered that the perf subsystem in the Linux kernel did not properly handle event     groups, leading to an out-of-bounds write vulnerability. A local attacker could use this to cause a denial     of service (system crash) or possibly execute arbitrary code. (CVE-2023-5717)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 20.04 LTS / 22.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-6549-1 advisory.

    It was discovered that the USB subsystem in the Linux kernel contained a race condition while handling     device descriptors in certain situations, leading to a out-of-bounds read vulnerability. A local attacker     could possibly use this to cause a denial of service (system crash). (CVE-2023-37453)

    Lin Ma discovered that the Netlink Transformation (XFRM) subsystem in the Linux kernel did not properly     initialize a policy data structure, leading to an out-of-bounds vulnerability. A local privileged attacker     could use this to cause a denial of service (system crash) or possibly expose sensitive information     (kernel memory). (CVE-2023-3773)

    Lucas Leong discovered that the netfilter subsystem in the Linux kernel did not properly validate some     attributes passed from userspace. A local attacker could use this to cause a denial of service (system     crash) or possibly expose sensitive information (kernel memory). (CVE-2023-39189)

    Sunjoo Park discovered that the netfilter subsystem in the Linux kernel did not properly validate u32     packets content, leading to an out-of-bounds read vulnerability. A local attacker could use this to cause     a denial of service (system crash) or possibly expose sensitive information. (CVE-2023-39192)

    Lucas Leong discovered that the netfilter subsystem in the Linux kernel did not properly validate SCTP     data, leading to an out-of-bounds read vulnerability. A local attacker could use this to cause a denial of     service (system crash) or possibly expose sensitive information. (CVE-2023-39193)

    Lucas Leong discovered that the Netlink Transformation (XFRM) subsystem in the Linux kernel did not     properly handle state filters, leading to an out- of-bounds read vulnerability. A privileged local     attacker could use this to cause a denial of service (system crash) or possibly expose sensitive     information. (CVE-2023-39194)

    It was discovered that a race condition existed in QXL virtual GPU driver in the Linux kernel, leading to     a use after free vulnerability. A local attacker could use this to cause a denial of service (system     crash) or possibly execute arbitrary code. (CVE-2023-39198)

    Kyle Zeng discovered that the IPv4 implementation in the Linux kernel did not properly handle socket     buffers (skb) when performing IP routing in certain circumstances, leading to a null pointer dereference     vulnerability. A privileged attacker could use this to cause a denial of service (system crash).
    (CVE-2023-42754)

    Jason Wang discovered that the virtio ring implementation in the Linux kernel did not properly handle iov     buffers in some situations. A local attacker in a guest VM could use this to cause a denial of service     (host system crash). (CVE-2023-5158)

    Alon Zahavi discovered that the NVMe-oF/TCP subsystem in the Linux kernel did not properly handle queue     initialization failures in certain situations, leading to a use-after-free vulnerability. A remote     attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.
    (CVE-2023-5178)

    Budimir Markovic discovered that the perf subsystem in the Linux kernel did not properly handle event     groups, leading to an out-of-bounds write vulnerability. A local attacker could use this to cause a denial     of service (system crash) or possibly execute arbitrary code. (CVE-2023-5717)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 22.04 LTS / 23.04 host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-6534-1 advisory.

    It was discovered that the USB subsystem in the Linux kernel contained a race condition while handling     device descriptors in certain situations, leading to a out-of-bounds read vulnerability. A local attacker     could possibly use this to cause a denial of service (system crash). (CVE-2023-37453)

    Lin Ma discovered that the Netlink Transformation (XFRM) subsystem in the Linux kernel did not properly     initialize a policy data structure, leading to an out-of-bounds vulnerability. A local privileged attacker     could use this to cause a denial of service (system crash) or possibly expose sensitive information     (kernel memory). (CVE-2023-3773)

    Lucas Leong discovered that the netfilter subsystem in the Linux kernel did not properly validate some     attributes passed from userspace. A local attacker could use this to cause a denial of service (system     crash) or possibly expose sensitive information (kernel memory). (CVE-2023-39189)

    Sunjoo Park discovered that the netfilter subsystem in the Linux kernel did not properly validate u32     packets content, leading to an out-of-bounds read vulnerability. A local attacker could use this to cause     a denial of service (system crash) or possibly expose sensitive information. (CVE-2023-39192)

    Lucas Leong discovered that the netfilter subsystem in the Linux kernel did not properly validate SCTP     data, leading to an out-of-bounds read vulnerability. A local attacker could use this to cause a denial of     service (system crash) or possibly expose sensitive information. (CVE-2023-39193)

    Lucas Leong discovered that the Netlink Transformation (XFRM) subsystem in the Linux kernel did not     properly handle state filters, leading to an out- of-bounds read vulnerability. A privileged local     attacker could use this to cause a denial of service (system crash) or possibly expose sensitive     information. (CVE-2023-39194)

    It was discovered that a race condition existed in QXL virtual GPU driver in the Linux kernel, leading to     a use after free vulnerability. A local attacker could use this to cause a denial of service (system     crash) or possibly execute arbitrary code. (CVE-2023-39198)

    Kyle Zeng discovered that the IPv4 implementation in the Linux kernel did not properly handle socket     buffers (skb) when performing IP routing in certain circumstances, leading to a null pointer dereference     vulnerability. A privileged attacker could use this to cause a denial of service (system crash).
    (CVE-2023-42754)

    Jason Wang discovered that the virtio ring implementation in the Linux kernel did not properly handle iov     buffers in some situations. A local attacker in a guest VM could use this to cause a denial of service     (host system crash). (CVE-2023-5158)

    Alon Zahavi discovered that the NVMe-oF/TCP subsystem in the Linux kernel did not properly handle queue     initialization failures in certain situations, leading to a use-after-free vulnerability. A remote     attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.
    (CVE-2023-5178)

    Budimir Markovic discovered that the perf subsystem in the Linux kernel did not properly handle event     groups, leading to an out-of-bounds write vulnerability. A local attacker could use this to cause a denial     of service (system crash) or possibly execute arbitrary code. (CVE-2023-5717)

    It was discovered that the Microchip USB Ethernet driver in the Linux kernel contained a race condition     during device removal, leading to a use- after-free vulnerability. A physically proximate attacker could     use this to cause a denial of service (system crash). (CVE-2023-6039)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2023-6583 advisory.

  - A vulnerability was found in Linux Kernel. It has been declared as problematic. Affected by this     vulnerability is the function intr_callback of the file drivers/net/usb/r8152.c of the component BPF. The     manipulation leads to logging of excessive data. The attack can be launched remotely. It is recommended to     apply a patch to fix this issue. The associated identifier of this vulnerability is VDB-211363.
    (CVE-2022-3594)

  - A flaw was found in the Linux kernel's TUN/TAP functionality. This issue could allow a local user to     bypass network filters and gain unauthorized access to some resources. The original patches fixing     CVE-2023-1076 are incorrect or incomplete. The problem is that the following upstream commits -     a096ccca6e50 (tun: tun_chr_open(): correctly initialize socket uid), - 66b2c338adce (tap: tap_open():
    correctly initialize socket uid), pass inode->i_uid to sock_init_data_uid() as the last parameter and     that turns out to not be accurate. (CVE-2023-4194)

  - A use-after-free flaw was found in r592_remove in drivers/memstick/host/r592.c in media access in the     Linux Kernel. This flaw allows a local attacker to crash the system at device disconnect, possibly leading     to a kernel information leak. (CVE-2023-3141)

  - In the Linux kernel before 6.1.13, there is a double free in net/mpls/af_mpls.c upon an allocation failure     (for registering the sysctl table under a new location) during the renaming of a device. (CVE-2023-26545)

  - A vulnerability, which was classified as critical, has been found in Linux Kernel. Affected by this issue     is the function del_timer of the file drivers/isdn/mISDN/l1oip_core.c of the component Bluetooth. The     manipulation leads to use after free. It is recommended to apply a patch to fix this issue. The identifier     of this vulnerability is VDB-211088. (CVE-2022-3565)

  - A use-after-free(UAF) vulnerability was found in function 'vmw_cmd_res_check' in     drivers/gpu/vmxgfx/vmxgfx_execbuf.c in Linux kernel's vmwgfx driver with device file '/dev/dri/renderD128     (or Dxxx)'. This flaw allows a local attacker with a user account on the system to gain privilege, causing     a denial of service(DoS). (CVE-2022-38457)

  - There is an infoleak vulnerability in the Linux kernel's net/bluetooth/l2cap_core.c's l2cap_parse_conf_req     function which can be used to leak kernel pointers remotely. We recommend upgrading past commit     https://github.com/torvalds/linux/commit/b1a2cd50c0357f243b7435a732b4e62ba3157a2e     https://www.google.com/url (CVE-2022-42895)

  - A flaw was found in the Framebuffer Console (fbcon) in the Linux Kernel. When providing font->width and     font->height greater than 32 to fbcon_set_font, since there are no checks in place, a shift-out-of-bounds     occurs leading to undefined behavior and possible denial of service. (CVE-2023-3161)

  - A null pointer dereference was found in the Linux kernel's Integrated Sensor Hub (ISH) driver. This issue     could allow a local user to crash the system. (CVE-2023-3358)

  - A use-after-free(UAF) vulnerability was found in function 'vmw_execbuf_tie_context' in     drivers/gpu/vmxgfx/vmxgfx_execbuf.c in Linux kernel's vmwgfx driver with device file '/dev/dri/renderD128     (or Dxxx)'. This flaw allows a local attacker with a user account on the system to gain privilege, causing     a denial of service(DoS). (CVE-2022-40133)

  - A memory leak flaw was found in the Linux kernel's Stream Control Transmission Protocol. This issue may     occur when a user starts a malicious networking service and someone connects to this service. This could     allow a local user to starve resources, causing a denial of service. (CVE-2023-1074)

  - A flaw was found in the Linux Kernel. The tun/tap sockets have their socket UID hardcoded to 0 due to a     type confusion in their initialization function. While it will be often correct, as tuntap devices require     CAP_NET_ADMIN, it may not always be the case, e.g., a non-root user only having that capability. This     would make tun/tap sockets being incorrectly treated in filtering/routing decisions, possibly bypassing     network filters. (CVE-2023-1076)

  - An issue was discovered in arch/x86/kvm/vmx/nested.c in the Linux kernel before 6.2.8. nVMX on x86_64     lacks consistency checks for CR0 and CR4. (CVE-2023-30456)

  - A flaw possibility of memory leak in the Linux kernel cpu_entry_area mapping of X86 CPU data to memory was     found in the way user can guess location of exception stack(s) or other important data. A local user could     use this flaw to get access to some important data with expected location in memory. (CVE-2023-0597)

  - A memory corruption flaw was found in the Linux kernel's human interface device (HID) subsystem in how a     user inserts a malicious USB device. This flaw allows a local user to crash or potentially escalate their     privileges on the system. (CVE-2023-1073)

  - A flaw was found in the Linux Kernel. The tls_is_tx_ready() incorrectly checks for list emptiness,     potentially accessing a type confused entry to the list_head, leaking the last byte of the confused field     that overlaps with rec->tx_ready. (CVE-2023-1075)

  - A use-after-free flaw was found in the Linux kernel's core dump subsystem. This flaw allows a local user     to crash the system. Only if patch 390031c94211 (coredump: Use the vma snapshot in fill_files_note) not     applied yet, then kernel could be affected. (CVE-2023-1249)

  - A use-after-free flaw was found in btsdio_remove in drivers\bluetooth\btsdio.c in the Linux Kernel. In     this flaw, a call to btsdio_remove with an unfinished job, may cause a race problem leading to a UAF on     hdev devices. (CVE-2023-1989)

  - A vulnerability was found in Linux Kernel. It has been classified as problematic. Affected is an unknown     function of the file mm/memory.c of the component Driver Handler. The manipulation leads to use after     free. It is possible to launch the attack remotely. It is recommended to apply a patch to fix this issue.
    The identifier of this vulnerability is VDB-211020. (CVE-2022-3523)

  - A hash collision flaw was found in the IPv6 connection lookup table in the Linux kernel's IPv6     functionality when a user makes a new kind of SYN flood attack. A user located in the local network or     with a high bandwidth connection can increase the CPU usage of the server that accepts IPV6 connections up     to 95%. (CVE-2023-1206)

  - A flaw was found in the Linux kernel's IP framework for transforming packets (XFRM subsystem). This issue     may allow a malicious user with CAP_NET_ADMIN privileges to cause a 4 byte out-of-bounds read of     XFRMA_MTIMER_THRESH when parsing netlink attributes, leading to potential leakage of sensitive heap data     to userspace. (CVE-2023-3773)

  - A flaw was found in KVM AMD Secure Encrypted Virtualization (SEV) in the Linux kernel. A KVM guest using     SEV-ES or SEV-SNP with multiple vCPUs can trigger a double fetch race condition vulnerability and invoke     the `VMGEXIT` handler recursively. If an attacker manages to call the handler multiple times, they can     trigger a stack overflow and cause a denial of service or potentially guest-to-host escape in kernel     configurations without stack guard pages (`CONFIG_VMAP_STACK`). (CVE-2023-4155)

  - A use-after-free vulnerability in the Linux kernel's net/sched: cls_fw component can be exploited to     achieve local privilege escalation. When fw_change() is called on an existing filter, the whole tcf_result     struct is always copied into the new instance of the filter. This causes a problem when updating a filter     bound to a class, as tcf_unbind_filter() is always called on the old instance in the success path,     decreasing filter_cnt of the still referenced class and allowing it to be deleted, leading to a use-after-     free. We recommend upgrading past commit 76e42ae831991c828cffa8c37736ebfb831ad5ec. (CVE-2023-4207)

  - A use-after-free vulnerability in the Linux kernel's net/sched: cls_u32 component can be exploited to     achieve local privilege escalation. When u32_change() is called on an existing filter, the whole     tcf_result struct is always copied into the new instance of the filter. This causes a problem when     updating a filter bound to a class, as tcf_unbind_filter() is always called on the old instance in the     success path, decreasing filter_cnt of the still referenced class and allowing it to be deleted, leading     to a use-after-free. We recommend upgrading past commit 3044b16e7c6fe5d24b1cdbcf1bd0a9d92d1ebd81.
    (CVE-2023-4208)

  - A flaw was found in the exFAT driver of the Linux kernel. The vulnerability exists in the implementation     of the file name reconstruction function, which is responsible for reading file name entries from a     directory index and merging file name parts belonging to one file into a single long file name. Since the     file name characters are copied into a stack variable, a local privileged attacker could use this flaw to     overflow the kernel stack. (CVE-2023-4273)

  - A use-after-free flaw was found in xgene_hwmon_remove in drivers/hwmon/xgene-hwmon.c in the Hardware     Monitoring Linux Kernel Driver (xgene-hwmon). This flaw could allow a local attacker to crash the system     due to a race problem. This vulnerability could even lead to a kernel information leak problem.
    (CVE-2023-1855)

  - A NULL pointer dereference issue was found in the gfs2 file system in the Linux kernel. It occurs on     corrupt gfs2 file systems when the evict code tries to reference the journal descriptor structure after it     has been freed and set to NULL. A privileged local user could use this flaw to cause a kernel panic.
    (CVE-2023-3212)

  - The Linux kernel before 6.2.9 has a race condition and resultant use-after-free in     drivers/net/ethernet/qualcomm/emac/emac.c if a physically proximate attacker unplugs an emac based device.
    (CVE-2023-33203)

  - A double-free vulnerability was found in the vmwgfx driver in the Linux kernel. The flaw exists within the     handling of vmw_buffer_object objects. The issue results from the lack of validating the existence of an     object prior to performing further free operations on the object. This flaw allows a local privileged user     to escalate privileges and execute code in the context of the kernel. (CVE-2023-33952)

  - Information exposure through microarchitectural state after transient execution in certain vector     execution units for some Intel(R) Processors may allow an authenticated user to potentially enable     information disclosure via local access. (CVE-2022-40982)

  - An out of bounds (OOB) memory access flaw was found in the Linux kernel in relay_file_read_start_pos in     kernel/relay.c in the relayfs. This flaw could allow a local attacker to crash the system or leak kernel     internal information. (CVE-2023-3268)

  - A use-after-free vulnerability in the Linux kernel's net/sched: cls_u32 component can be exploited to     achieve local privilege escalation. If tcf_change_indev() fails, u32_set_parms() will immediately return     an error after incrementing or decrementing the reference counter in tcf_bind_filter(). If an attacker can     control the reference counter and set it to zero, they can cause the reference to be freed, leading to a     use-after-free vulnerability. We recommend upgrading past commit 04c55383fa5689357bcdd2c8036725a55ed632bc.
    (CVE-2023-3609)

  - A use-after-free flaw was found in the Linux kernel's Ext4 File System in how a user triggers several file     operations simultaneously with the overlay FS usage. This flaw allows a local user to crash or potentially     escalate their privileges on the system. Only if patch 9a2544037600 (ovl: fix use after free in struct     ovl_aio_req) not applied yet, the kernel could be affected. (CVE-2023-1252)

  - A use-after-free flaw was found in nfsd4_ssc_setup_dul in fs/nfsd/nfs4proc.c in the NFS filesystem in the     Linux Kernel. This issue could allow a local attacker to crash the system or it may lead to a kernel     information leak problem. (CVE-2023-1652)

  - A race condition vulnerability was found in the vmwgfx driver in the Linux kernel. The flaw exists within     the handling of GEM objects. The issue results from improper locking when performing operations on an     object. This flaw allows a local privileged user to disclose information in the context of the kernel.
    (CVE-2023-33951)

  - A flaw was found in the Linux kernel. A use-after-free may be triggered in asus_kbd_backlight_set when     plugging/disconnecting in a malicious USB device, which advertises itself as an Asus device. Similarly to     the previous known CVE-2023-25012, but in asus devices, the work_struct may be scheduled by the LED     controller while the device is disconnecting, triggering a use-after-free on the struct asus_kbd_leds *led     structure. A malicious USB device may exploit the issue to cause memory corruption with controlled data.
    (CVE-2023-1079)

  - A use-after-free vulnerability in the Linux kernel's net/sched: cls_route component can be exploited to     achieve local privilege escalation. When route4_change() is called on an existing filter, the whole     tcf_result struct is always copied into the new instance of the filter. This causes a problem when     updating a filter bound to a class, as tcf_unbind_filter() is always called on the old instance in the     success path, decreasing filter_cnt of the still referenced class and allowing it to be deleted, leading     to a use-after-free. We recommend upgrading past commit b80b829e9e2c1b3f7aae34855e04d8f6ecaf13c8.
    (CVE-2023-4206)

  - An improper input validation flaw was found in the eBPF subsystem in the Linux kernel. The issue occurs     due to a lack of proper validation of dynamic pointers within user-supplied eBPF programs prior to     executing them. This may allow an attacker with CAP_BPF privileges to escalate privileges and execute     arbitrary code in the context of the kernel. (CVE-2023-39191)

  - A flaw was found in the Linux kernel's IP framework for transforming packets (XFRM subsystem). This issue     may allow a malicious user with CAP_NET_ADMIN privileges to directly dereference a NULL pointer in     xfrm_update_ae_params(), leading to a possible kernel crash and denial of service. (CVE-2023-3772)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-3623 advisory.

  - An issue was discovered the x86 KVM subsystem in the Linux kernel before 5.18.17. Unprivileged guest users     can compromise the guest kernel because TLB flush operations are mishandled in certain KVM_VCPU_PREEMPTED     situations. (CVE-2022-39189)

  - A flaw was found in the Linux kernel Traffic Control (TC) subsystem. Using a specific networking     configuration (redirecting egress packets to ingress using TC action mirred) a local unprivileged user     could trigger a CPU soft lockup (ABBA deadlock) when the transport protocol in use (TCP or SCTP) does a     retransmission, resulting in a denial of service condition. (CVE-2022-4269)

  - A hash collision flaw was found in the IPv6 connection lookup table in the Linux kernel's IPv6     functionality when a user makes a new kind of SYN flood attack. A user located in the local network or     with a high bandwidth connection can increase the CPU usage of the server that accepts IPV6 connections up     to 95%. (CVE-2023-1206)

  - A slab-out-of-bound read problem was found in brcmf_get_assoc_ies in     drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c in the Linux Kernel. This issue could occur     when assoc_info->req_len data is bigger than the size of the buffer, defined as WL_EXTRA_BUF_MAX, leading     to a denial of service. (CVE-2023-1380)

  - A vulnerability was found in the HCI sockets implementation due to a missing capability check in     net/bluetooth/hci_sock.c in the Linux Kernel. This flaw allows an attacker to unauthorized execution of     management commands, compromising the confidentiality, integrity, and availability of Bluetooth     communication. (CVE-2023-2002)

  - The specific flaw exists within the DPT I2O Controller driver. The issue results from the lack of proper     locking when performing operations on an object. An attacker can leverage this in conjunction with other     vulnerabilities to escalate privileges and execute arbitrary code in the context of the kernel.
    (CVE-2023-2007)

  - A division-by-zero error on some AMD processors can potentially return speculative data resulting in loss     of confidentiality. (CVE-2023-20588)

  - An out-of-bounds memory access flaw was found in the Linux kernel's XFS file system in how a user restores     an XFS image after failure (with a dirty log journal). This flaw allows a local user to crash or     potentially escalate their privileges on the system. (CVE-2023-2124)

  - In multiple functions of binder.c, there is a possible memory corruption due to a use after free. This     could lead to local escalation of privilege with no additional execution privileges needed. User     interaction is not needed for exploitation. (CVE-2023-21255)

  - In multiple functions of io_uring.c, there is a possible kernel memory corruption due to improper locking.
    This could lead to local escalation of privilege in the kernel with System execution privileges needed.
    User interaction is not needed for exploitation. (CVE-2023-21400)

  - A denial of service problem was found, due to a possible recursive locking scenario, resulting in a     deadlock in table_clear in drivers/md/dm-ioctl.c in the Linux Kernel Device Mapper-Multipathing sub-     component. (CVE-2023-2269)

  - There is a null-pointer-dereference flaw found in f2fs_write_end_io in fs/f2fs/data.c in the Linux kernel.
    This flaw allows a local privileged user to cause a denial of service problem. (CVE-2023-2898)

  - A heap out-of-bounds write vulnerability in the Linux Kernel ipvlan network driver can be exploited to     achieve local privilege escalation. The out-of-bounds write is caused by missing skb->cb initialization in     the ipvlan network driver. The vulnerability is reachable if CONFIG_IPVLAN is enabled. We recommend     upgrading past commit 90cbed5247439a966b645b34eb0a2e037836ea8e. (CVE-2023-3090)

  - An issue was discovered in drivers/media/dvb-core/dvb_frontend.c in the Linux kernel 6.2. There is a     blocking operation when a task is in !TASK_RUNNING. In dvb_frontend_get_event, wait_event_interruptible is     called; the condition is dvb_frontend_test_event(fepriv,events). In dvb_frontend_test_event,     down(&fepriv->sem) is called. However, wait_event_interruptible would put the process to sleep, and     down(&fepriv->sem) may block the process. (CVE-2023-31084)

  - A use after free vulnerability was found in prepare_to_relocate in fs/btrfs/relocation.c in btrfs in the     Linux Kernel. This possible flaw can be triggered by calling btrfs_ioctl_balance() before calling     btrfs_ioctl_defrag(). (CVE-2023-3111)

  - A use-after-free flaw was found in r592_remove in drivers/memstick/host/r592.c in media access in the     Linux Kernel. This flaw allows a local attacker to crash the system at device disconnect, possibly leading     to a kernel information leak. (CVE-2023-3141)

  - A NULL pointer dereference issue was found in the gfs2 file system in the Linux kernel. It occurs on     corrupt gfs2 file systems when the evict code tries to reference the journal descriptor structure after it     has been freed and set to NULL. A privileged local user could use this flaw to cause a kernel panic.
    (CVE-2023-3212)

  - An out of bounds (OOB) memory access flaw was found in the Linux kernel in relay_file_read_start_pos in     kernel/relay.c in the relayfs. This flaw could allow a local attacker to crash the system or leak kernel     internal information. (CVE-2023-3268)

  - A null pointer dereference flaw was found in the Linux kernel's DECnet networking protocol. This issue     could allow a remote user to crash the system. (CVE-2023-3338)

  - A use-after-free vulnerability in the Linux Kernel io_uring subsystem can be exploited to achieve local     privilege escalation. Racing a io_uring cancel poll request with a linked timeout can cause a UAF in a     hrtimer. We recommend upgrading past commit ef7dfac51d8ed961b742218f526bd589f3900a59     (4716c73b188566865bdd79c3a6709696a224ac04 for 5.10 stable and 0e388fce7aec40992eadee654193cad345d62663 for     5.15 stable). (CVE-2023-3389)

  - ** DISPUTED ** An issue was discovered in the Linux kernel before 6.3.3. There is an out-of-bounds read in     crc16 in lib/crc16.c when called from fs/ext4/super.c because ext4_group_desc_csum does not properly check     an offset. NOTE: this is disputed by third parties because the kernel is not intended to defend against     attackers with the stated When modifying the block device while it is mounted by the filesystem access.
    (CVE-2023-34256)

  - The fix for XSA-423 added logic to Linux'es netback driver to deal with a frontend splitting a packet in a     way such that not all of the headers would come in one piece. Unfortunately the logic introduced there     didn't account for the extreme case of the entire packet being split into as many pieces as permitted by     the protocol, yet still being smaller than the area that's specially dealt with to keep all (possible)     headers together. Such an unusual packet would therefore trigger a buffer overrun in the driver.
    (CVE-2023-34319)

  - An issue was discovered in fl_set_geneve_opt in net/sched/cls_flower.c in the Linux kernel before 6.3.7.
    It allows an out-of-bounds write in the flower classifier code via TCA_FLOWER_KEY_ENC_OPTS_GENEVE packets.
    This may result in denial of service or privilege escalation. (CVE-2023-35788)

  - An issue was discovered in the Linux kernel before 6.3.2. A use-after-free was found in saa7134_finidev in     drivers/media/pci/saa7134/saa7134-core.c. (CVE-2023-35823)

  - An issue was discovered in the Linux kernel before 6.3.2. A use-after-free was found in dm1105_remove in     drivers/media/pci/dm1105/dm1105.c. (CVE-2023-35824)

  - A use-after-free vulnerability in the Linux kernel's net/sched: cls_u32 component can be exploited to     achieve local privilege escalation. If tcf_change_indev() fails, u32_set_parms() will immediately return     an error after incrementing or decrementing the reference counter in tcf_bind_filter(). If an attacker can     control the reference counter and set it to zero, they can cause the reference to be freed, leading to a     use-after-free vulnerability. We recommend upgrading past commit 04c55383fa5689357bcdd2c8036725a55ed632bc.
    (CVE-2023-3609)

  - An out-of-bounds write vulnerability in the Linux kernel's net/sched: sch_qfq component can be exploited     to achieve local privilege escalation. The qfq_change_agg() function in net/sched/sch_qfq.c allows an out-     of-bounds write because lmax is updated according to packet sizes without bounds checks. We recommend     upgrading past commit 3e337087c3b5805fe0b8a46ba622a962880b5d64. (CVE-2023-3611)

  - A flaw was found in the Linux kernel's IP framework for transforming packets (XFRM subsystem). This issue     may allow a malicious user with CAP_NET_ADMIN privileges to directly dereference a NULL pointer in     xfrm_update_ae_params(), leading to a possible kernel crash and denial of service. (CVE-2023-3772)

  - A flaw was found in the Linux kernel's IP framework for transforming packets (XFRM subsystem). This issue     may allow a malicious user with CAP_NET_ADMIN privileges to cause a 4 byte out-of-bounds read of     XFRMA_MTIMER_THRESH when parsing netlink attributes, leading to potential leakage of sensitive heap data     to userspace. (CVE-2023-3773)

  - A use-after-free vulnerability in the Linux kernel's net/sched: cls_fw component can be exploited to     achieve local privilege escalation. If tcf_change_indev() fails, fw_set_parms() will immediately return an     error after incrementing or decrementing the reference counter in tcf_bind_filter(). If an attacker can     control the reference counter and set it to zero, they can cause the reference to be freed, leading to a     use-after-free vulnerability. We recommend upgrading past commit 0323bce598eea038714f941ce2b22541c46d488f.
    (CVE-2023-3776)

  - A use-after-free flaw was found in nfc_llcp_find_local in net/nfc/llcp_core.c in NFC in the Linux kernel.
    This flaw allows a local user with special privileges to impact a kernel information leak issue.
    (CVE-2023-3863)

  - A use-after-free flaw was found in the Linux kernel's netfilter in the way a user triggers the     nft_pipapo_remove function with the element, without a NFT_SET_EXT_KEY_END. This issue could allow a local     user to crash the system or potentially escalate their privileges on the system. (CVE-2023-4004)

  - An issue was discovered in l2cap_sock_release in net/bluetooth/l2cap_sock.c in the Linux kernel before     6.4.10. There is a use-after-free because the children of an sk are mishandled. (CVE-2023-40283)

  - A use-after-free flaw was found in net/sched/cls_fw.c in classifiers (cls_fw, cls_u32, and cls_route) in     the Linux Kernel. This flaw allows a local attacker to perform a local privilege escalation due to     incorrect handling of the existing filter, leading to a kernel information leak issue. (CVE-2023-4128)

  - A use-after-free vulnerability was found in the siano smsusb module in the Linux kernel. The bug occurs     during device initialization when the siano device is plugged in. This flaw allows a local user to crash     the system, causing a denial of service condition. (CVE-2023-4132)

  - A use-after-free flaw was found in the Linux kernel's Netfilter functionality when adding a rule with     NFTA_RULE_CHAIN_ID. This flaw allows a local user to crash or escalate their privileges on the system.
    (CVE-2023-4147)

  - A flaw was found in the Linux kernel's TUN/TAP functionality. This issue could allow a local user to     bypass network filters and gain unauthorized access to some resources. The original patches fixing     CVE-2023-1076 are incorrect or incomplete. The problem is that the following upstream commits -     a096ccca6e50 (tun: tun_chr_open(): correctly initialize socket uid), - 66b2c338adce (tap: tap_open():
    correctly initialize socket uid), pass inode->i_uid to sock_init_data_uid() as the last parameter and     that turns out to not be accurate. (CVE-2023-4194)

  - A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to     achieve local privilege escalation. Due to a race condition between nf_tables netlink control plane     transaction and nft_set element garbage collection, it is possible to underflow the reference counter     causing a use-after-free vulnerability. We recommend upgrading past commit     3e91b0ebd994635df2346353322ac51ce84ce6d8. (CVE-2023-4244)

  - A flaw was found in the exFAT driver of the Linux kernel. The vulnerability exists in the implementation     of the file name reconstruction function, which is responsible for reading file name entries from a     directory index and merging file name parts belonging to one file into a single long file name. Since the     file name characters are copied into a stack variable, a local privileged attacker could use this flaw to     overflow the kernel stack. (CVE-2023-4273)

  - An array indexing vulnerability was found in the netfilter subsystem of the Linux kernel. A missing macro     could lead to a miscalculation of the `h->nets` array offset, providing attackers with the primitive to     arbitrarily increment/decrement a memory buffer out-of-bound. This issue may allow a local user to crash     the system or potentially escalate their privileges on the system. (CVE-2023-42753)

  - A flaw was found in the IPv4 Resource Reservation Protocol (RSVP) classifier in the Linux kernel. The xprt     pointer may go beyond the linear part of the skb, leading to an out-of-bounds read in the `rsvp_classify`     function. This issue may allow a local user to crash the system and cause a denial of service.
    (CVE-2023-42755)

  - A flaw was found in the Netfilter subsystem of the Linux kernel. A race condition between IPSET_CMD_ADD     and IPSET_CMD_SWAP can lead to a kernel panic due to the invocation of `__ip_set_put` on a wrong `set`.
    This issue may allow a local user to crash the system. (CVE-2023-42756)

  - A use-after-free vulnerability in the Linux kernel's af_unix component can be exploited to achieve local     privilege escalation. The unix_stream_sendpage() function tries to add data to the last skb in the peer's     recv queue without locking the queue. Thus there is a race where unix_stream_sendpage() could access an     skb locklessly that is being released by garbage collection, resulting in use-after-free. We recommend     upgrading past commit 790c2f9d15b594350ae9bca7b236f2b1859de02c. (CVE-2023-4622)

  - A use-after-free vulnerability in the Linux kernel's net/sched: sch_hfsc (HFSC qdisc traffic control)     component can be exploited to achieve local privilege escalation. If a class with a link-sharing curve     (i.e. with the HFSC_FSC flag set) has a parent without a link-sharing curve, then init_vf() will call     vttree_insert() on the parent, but vttree_remove() will be skipped in update_vf(). This leaves a dangling     pointer that can cause a use-after-free. We recommend upgrading past commit     b3d26c5702c7d6c45456326e56d2ccf3f103e60f. (CVE-2023-4623)

  - A use-after-free vulnerability in the Linux kernel's net/sched: sch_qfq component can be exploited to     achieve local privilege escalation. When the plug qdisc is used as a class of the qfq qdisc, sending     network packets triggers use-after-free in qfq_dequeue() due to the incorrect .peek handler of sch_plug     and lack of error checking in agg_dequeue(). We recommend upgrading past commit     8fc134fee27f2263988ae38920bc03da416b03d8. (CVE-2023-4921)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 22.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-6415-1 advisory.

    Daniel Trujillo, Johannes Wikner, and Kaveh Razavi discovered that some AMD processors utilising     speculative execution and branch prediction may allow unauthorised memory reads via a speculative side-     channel attack. A local attacker could use this to expose sensitive information, including kernel memory.
    (CVE-2023-20569)

    Ivan D Barrera, Christopher Bednarz, Mustafa Ismail, and Shiraz Saleem discovered that the InfiniBand RDMA     driver in the Linux kernel did not properly check for zero-length STAG or MR registration. A remote     attacker could possibly use this to execute arbitrary code. (CVE-2023-25775)

    It was discovered that the USB subsystem in the Linux kernel contained a race condition while handling     device descriptors in certain situations, leading to a out-of-bounds read vulnerability. A local attacker     could possibly use this to cause a denial of service (system crash). (CVE-2023-37453)

    Lin Ma discovered that the Netlink Transformation (XFRM) subsystem in the Linux kernel contained a null     pointer dereference vulnerability in some situations. A local privileged attacker could use this to cause     a denial of service (system crash). (CVE-2023-3772)

    Lin Ma discovered that the Netlink Transformation (XFRM) subsystem in the Linux kernel did not properly     initialize a policy data structure, leading to an out-of-bounds vulnerability. A local privileged attacker     could use this to cause a denial of service (system crash) or possibly expose sensitive information     (kernel memory). (CVE-2023-3773)

    Kyle Zeng discovered that the netfiler subsystem in the Linux kernel did not properly calculate array     offsets, leading to a out-of-bounds write vulnerability. A local user could use this to cause a denial of     service (system crash) or possibly execute arbitrary code. (CVE-2023-42753)

    Bing-Jhong Billy Jheng discovered that the Unix domain socket implementation in the Linux kernel contained     a race condition in certain situations, leading to a use-after-free vulnerability. A local attacker could     use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-4622)

    Budimir Markovic discovered that the qdisc implementation in the Linux kernel did not properly validate     inner classes, leading to a use-after-free vulnerability. A local user could use this to cause a denial of     service (system crash) or possibly execute arbitrary code. (CVE-2023-4623)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 12 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-5492 advisory.

  - A hash collision flaw was found in the IPv6 connection lookup table in the Linux kernel's IPv6     functionality when a user makes a new kind of SYN flood attack. A user located in the local network or     with a high bandwidth connection can increase the CPU usage of the server that accepts IPV6 connections up     to 95%. (CVE-2023-1206)

  - A use-after-free flaw was found in btsdio_remove in drivers\bluetooth\btsdio.c in the Linux Kernel. In     this flaw, a call to btsdio_remove with an unfinished job, may cause a race problem leading to a UAF on     hdev devices. (CVE-2023-1989)

  - A division-by-zero error on some AMD processors can potentially return speculative data resulting in loss     of confidentiality. (CVE-2023-20588)

  - A vulnerability was found due to missing lock for IOPOLL flaw in io_cqring_event_overflow() in io_uring.c     in Linux Kernel. This flaw allows a local attacker with user privilege to trigger a Denial of Service     threat. (CVE-2023-2430)

  - There is a null-pointer-dereference flaw found in f2fs_write_end_io in fs/f2fs/data.c in the Linux kernel.
    This flaw allows a local privileged user to cause a denial of service problem. (CVE-2023-2898)

  - An out-of-bounds write vulnerability in the Linux kernel's net/sched: sch_qfq component can be exploited     to achieve local privilege escalation. The qfq_change_agg() function in net/sched/sch_qfq.c allows an out-     of-bounds write because lmax is updated according to packet sizes without bounds checks. We recommend     upgrading past commit 3e337087c3b5805fe0b8a46ba622a962880b5d64. (CVE-2023-3611)

  - A flaw was found in the Linux kernel's IP framework for transforming packets (XFRM subsystem). This issue     may allow a malicious user with CAP_NET_ADMIN privileges to directly dereference a NULL pointer in     xfrm_update_ae_params(), leading to a possible kernel crash and denial of service. (CVE-2023-3772)

  - A flaw was found in the Linux kernel's IP framework for transforming packets (XFRM subsystem). This issue     may allow a malicious user with CAP_NET_ADMIN privileges to cause a 4 byte out-of-bounds read of     XFRMA_MTIMER_THRESH when parsing netlink attributes, leading to potential leakage of sensitive heap data     to userspace. (CVE-2023-3773)

  - A use-after-free vulnerability in the Linux kernel's net/sched: cls_fw component can be exploited to     achieve local privilege escalation. If tcf_change_indev() fails, fw_set_parms() will immediately return an     error after incrementing or decrementing the reference counter in tcf_bind_filter(). If an attacker can     control the reference counter and set it to zero, they can cause the reference to be freed, leading to a     use-after-free vulnerability. We recommend upgrading past commit 0323bce598eea038714f941ce2b22541c46d488f.
    (CVE-2023-3776)

  - A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to     achieve local privilege escalation. When nf_tables_delrule() is flushing table rules, it is not checked     whether the chain is bound and the chain's owner rule can also release the objects in certain     circumstances. We recommend upgrading past commit 6eaf41e87a223ae6f8e7a28d6e78384ad7e407f8.
    (CVE-2023-3777)

  - A use-after-free flaw was found in nfc_llcp_find_local in net/nfc/llcp_core.c in NFC in the Linux kernel.
    This flaw allows a local user with special privileges to impact a kernel information leak issue.
    (CVE-2023-3863)

  - A use-after-free flaw was found in the Linux kernel's netfilter in the way a user triggers the     nft_pipapo_remove function with the element, without a NFT_SET_EXT_KEY_END. This issue could allow a local     user to crash the system or potentially escalate their privileges on the system. (CVE-2023-4004)

  - A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to     achieve local privilege escalation. On an error when building a nftables rule, deactivating immediate     expressions in nft_immediate_deactivate() can lead unbinding the chain and objects be deactivated but     later used. We recommend upgrading past commit 0a771f7b266b02d262900c75f1e175c7fe76fec2. (CVE-2023-4015)

  - An issue was discovered in l2cap_sock_release in net/bluetooth/l2cap_sock.c in the Linux kernel before     6.4.10. There is a use-after-free because the children of an sk are mishandled. (CVE-2023-40283)

  - A use-after-free flaw was found in net/sched/cls_fw.c in classifiers (cls_fw, cls_u32, and cls_route) in     the Linux Kernel. This flaw allows a local attacker to perform a local privilege escalation due to     incorrect handling of the existing filter, leading to a kernel information leak issue. (CVE-2023-4128)

  - A use-after-free vulnerability was found in the siano smsusb module in the Linux kernel. The bug occurs     during device initialization when the siano device is plugged in. This flaw allows a local user to crash     the system, causing a denial of service condition. (CVE-2023-4132)

  - A use-after-free flaw was found in the Linux kernel's Netfilter functionality when adding a rule with     NFTA_RULE_CHAIN_ID. This flaw allows a local user to crash or escalate their privileges on the system.
    (CVE-2023-4147)

  - A flaw was found in the Linux kernel's TUN/TAP functionality. This issue could allow a local user to     bypass network filters and gain unauthorized access to some resources. The original patches fixing     CVE-2023-1076 are incorrect or incomplete. The problem is that the following upstream commits -     a096ccca6e50 (tun: tun_chr_open(): correctly initialize socket uid), - 66b2c338adce (tap: tap_open():
    correctly initialize socket uid), pass inode->i_uid to sock_init_data_uid() as the last parameter and     that turns out to not be accurate. (CVE-2023-4194)

  - A use-after-free vulnerability in the Linux kernel's net/sched: cls_route component can be exploited to     achieve local privilege escalation. When route4_change() is called on an existing filter, the whole     tcf_result struct is always copied into the new instance of the filter. This causes a problem when     updating a filter bound to a class, as tcf_unbind_filter() is always called on the old instance in the     success path, decreasing filter_cnt of the still referenced class and allowing it to be deleted, leading     to a use-after-free. We recommend upgrading past commit b80b829e9e2c1b3f7aae34855e04d8f6ecaf13c8.
    (CVE-2023-4206)

  - A use-after-free vulnerability in the Linux kernel's net/sched: cls_fw component can be exploited to     achieve local privilege escalation. When fw_change() is called on an existing filter, the whole tcf_result     struct is always copied into the new instance of the filter. This causes a problem when updating a filter     bound to a class, as tcf_unbind_filter() is always called on the old instance in the success path,     decreasing filter_cnt of the still referenced class and allowing it to be deleted, leading to a use-after-     free. We recommend upgrading past commit 76e42ae831991c828cffa8c37736ebfb831ad5ec. (CVE-2023-4207)

  - A use-after-free vulnerability in the Linux kernel's net/sched: cls_u32 component can be exploited to     achieve local privilege escalation. When u32_change() is called on an existing filter, the whole     tcf_result struct is always copied into the new instance of the filter. This causes a problem when     updating a filter bound to a class, as tcf_unbind_filter() is always called on the old instance in the     success path, decreasing filter_cnt of the still referenced class and allowing it to be deleted, leading     to a use-after-free. We recommend upgrading past commit 3044b16e7c6fe5d24b1cdbcf1bd0a9d92d1ebd81.
    (CVE-2023-4208)

  - A flaw was found in the exFAT driver of the Linux kernel. The vulnerability exists in the implementation     of the file name reconstruction function, which is responsible for reading file name entries from a     directory index and merging file name parts belonging to one file into a single long file name. Since the     file name characters are copied into a stack variable, a local privileged attacker could use this flaw to     overflow the kernel stack. (CVE-2023-4273)

  - A memory leak flaw was found in nft_set_catchall_flush in net/netfilter/nf_tables_api.c in the Linux     Kernel. This issue may allow a local attacker to cause a double-deactivations of catchall elements, which     results in a memory leak. (CVE-2023-4569)

  - A use-after-free vulnerability in the Linux kernel's af_unix component can be exploited to achieve local     privilege escalation. The unix_stream_sendpage() function tries to add data to the last skb in the peer's     recv queue without locking the queue. Thus there is a race where unix_stream_sendpage() could access an     skb locklessly that is being released by garbage collection, resulting in use-after-free. We recommend     upgrading past commit 790c2f9d15b594350ae9bca7b236f2b1859de02c. (CVE-2023-4622)

  - A division-by-zero error on some AMD processors can potentially return speculative data resulting in loss     of confidentiality. (CVE-2023-20588) (CVE-2023-34319)

  - KVM: SEV-ES / SEV-SNP VMGEXIT double fetch vulnerability [fedora-all] (CVE-2023-4155)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2023-330 advisory.

    2023-10-12: CVE-2023-39194 was added to this advisory.

    2023-09-27: CVE-2023-4208 was added to this advisory.

    2023-09-27: CVE-2023-4206 was added to this advisory.

    2023-09-27: CVE-2023-4622 was added to this advisory.

    2023-09-27: CVE-2023-4207 was added to this advisory.

    2023-09-14: CVE-2023-3777 was added to this advisory.

    2023-09-14: CVE-2023-4015 was added to this advisory.

    2023-09-14: CVE-2023-4569 was added to this advisory.

    A division-by-zero error on some AMD processors can potentially return speculative data resulting in loss     of confidentiality. (CVE-2023-20588)

    A buffer overrun vulnerability was found in the netback driver in Xen due to an unusual split packet. This     flaw allows an unprivileged guest to cause a denial of service (DoS) of the host by sending network     packets to the backend, causing the backend to crash. (CVE-2023-34319)

    A flaw was found in the Linux kernel's IP framework for transforming packets (XFRM subsystem). This issue     may allow a malicious user with CAP_NET_ADMIN privileges to directly dereference a NULL pointer in     xfrm_update_ae_params(), leading to a possible kernel crash and denial of service. (CVE-2023-3772)

    A flaw was found in the Linux kernel's IP framework for transforming packets (XFRM subsystem). This issue     may allow a malicious user with CAP_NET_ADMIN privileges to cause a 4 byte out-of-bounds read of     XFRMA_MTIMER_THRESH when parsing netlink attributes, leading to potential leakage of sensitive heap data     to userspace. (CVE-2023-3773)

    A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to     achieve local privilege escalation.

    When nf_tables_delrule() is flushing table rules, it is not checked whether the chain is bound and the     chain's owner rule can also release the objects in certain circumstances.

    We recommend upgrading past commit 6eaf41e87a223ae6f8e7a28d6e78384ad7e407f8. (CVE-2023-3777)

    net: xfrm: Fix xfrm_address_filter OOB read

    NOTE: https://www.zerodayinitiative.com/advisories/ZDI-23-1492/NOTE:
    https://git.kernel.org/linus/dfa73c17d55b921e1d4e154976de35317e43a93a (6.5-rc7) (CVE-2023-39194)

    A use-after-free flaw was found in the Linux kernel's netfilter in the way a user triggers the     nft_pipapo_remove function with the element, without a NFT_SET_EXT_KEY_END. This issue could allow a local     user to crash the system or potentially escalate their privileges on the system. (CVE-2023-4004)

    A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to     achieve local privilege escalation.

    On an error when building a nftables rule, deactivating immediate expressions in     nft_immediate_deactivate() can lead unbinding the chain and objects be deactivated but later used.

    We recommend upgrading past commit 0a771f7b266b02d262900c75f1e175c7fe76fec2. (CVE-2023-4015)

    A use-after-free flaw was found in net/sched/cls_fw.c in classifiers (cls_fw, cls_u32, and cls_route) in     the Linux Kernel. This flaw allows a local attacker to perform a local privilege escalation due to     incorrect handling of the existing filter, leading to a kernel information leak issue. (CVE-2023-4128)

    netfilter: nf_tables: disallow rule addition to bound chain via NFTA_RULE_CHAIN_ID (CVE-2023-4147)

    A flaw was found in the Linux kernel's TUN/TAP functionality. This issue could allow a local user to     bypass network filters and gain unauthorized access to some resources. The original patches fixing     CVE-2023-1076 are incorrect or incomplete. The problem is that the following upstream commits -     a096ccca6e50 (tun: tun_chr_open(): correctly initialize socket uid), - 66b2c338adce (tap: tap_open():
    correctly initialize socket uid), pass inode->i_uid to sock_init_data_uid() as the last parameter and     that turns out to not be accurate. (CVE-2023-4194)

    A use-after-free vulnerability in the Linux kernel's net/sched: cls_route component can be exploited to     achieve local privilege escalation.

    When route4_change() is called on an existing filter, the whole tcf_result struct is always copied into     the new instance of the filter. This causes a problem when updating a filter bound to a class, as     tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the     still referenced class and allowing it to be deleted, leading to a use-after-free.

    We recommend upgrading past commit b80b829e9e2c1b3f7aae34855e04d8f6ecaf13c8. (CVE-2023-4206)

    A use-after-free vulnerability in the Linux kernel's net/sched: cls_fw component can be exploited to     achieve local privilege escalation.

    When fw_change() is called on an existing filter, the whole tcf_result struct is always copied into the     new instance of the filter. This causes a problem when updating a filter bound to a class, as     tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the     still referenced class and allowing it to be deleted, leading to a use-after-free.

    We recommend upgrading past commit 76e42ae831991c828cffa8c37736ebfb831ad5ec. (CVE-2023-4207)

    A use-after-free vulnerability in the Linux kernel's net/sched: cls_u32 component can be exploited to     achieve local privilege escalation.

    When u32_change() is called on an existing filter, the whole tcf_result struct is always copied into the     new instance of the filter. This causes a problem when updating a filter bound to a class, as     tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the     still referenced class and allowing it to be deleted, leading to a use-after-free.

    We recommend upgrading past commit 3044b16e7c6fe5d24b1cdbcf1bd0a9d92d1ebd81. (CVE-2023-4208)

    A flaw was found in the exFAT driver of the Linux kernel. The vulnerability exists in the implementation     of the file name reconstruction function, which is responsible for reading file name entries from a     directory index and merging file name parts belonging to one file into a single long file name. Since the     file name characters are copied into a stack variable, a local privileged attacker could use this flaw to     overflow the kernel stack. (CVE-2023-4273)

    A memory leak flaw was found in nft_set_catchall_flush in net/netfilter/nf_tables_api.c in the Linux     Kernel. This issue may allow a local attacker to cause a double-deactivations of catchall elements, which     results in a memory leak. (CVE-2023-4569)

    A use-after-free vulnerability in the Linux kernel's af_unix component can be exploited to achieve local     privilege escalation.

    The unix_stream_sendpage() function tries to add data to the last skb in the peer's recv queue without     locking the queue. Thus there is a race where unix_stream_sendpage() could access an skb locklessly that     is being released by garbage collection, resulting in use-after-free.

    We recommend upgrading past commit 790c2f9d15b594350ae9bca7b236f2b1859de02c. (CVE-2023-4622)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of kernel installed on the remote host is prior to 5.15.128-80.144. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.15-2023-026 advisory.

    2024-07-03: CVE-2023-4194 was added to this advisory.

    2024-02-01: CVE-2023-4273 was added to this advisory.

    2023-11-29: CVE-2023-3773 was added to this advisory.

    2023-11-29: CVE-2023-3772 was added to this advisory.

    2023-10-12: CVE-2023-39194 was added to this advisory.

    2023-09-27: CVE-2023-4208 was added to this advisory.

    2023-09-27: CVE-2023-4206 was added to this advisory.

    2023-09-27: CVE-2023-4207 was added to this advisory.

    2023-09-27: CVE-2023-4622 was added to this advisory.

    2023-09-14: CVE-2023-4015 was added to this advisory.

    2023-09-14: CVE-2023-4569 was added to this advisory.

    2023-09-14: CVE-2023-3777 was added to this advisory.

    Information exposure through microarchitectural state after transient execution in certain vector     execution units for some Intel(R) Processors may allow an authenticated user to potentially enable     information disclosure via local access. (CVE-2022-40982)

    A division-by-zero error on some AMD processors can potentially return speculative data resulting in loss     of confidentiality. (CVE-2023-20588)

    The fix for XSA-423 added logic to Linux'es netback driver to deal witha frontend splitting a packet in a     way such that not all of the headerswould come in one piece.  Unfortunately the logic introduced     theredidn't account for the extreme case of the entire packet being splitinto as many pieces as permitted     by the protocol, yet still beingsmaller than the area that's specially dealt with to keep all     (possible)headers together.  Such an unusual packet would therefore trigger abuffer overrun in the driver.
    (CVE-2023-34319)

    A flaw was found in the Linux kernel's IP framework for transforming packets (XFRM subsystem). This issue     may allow a malicious user with CAP_NET_ADMIN privileges to directly dereference a NULL pointer in     xfrm_update_ae_params(), leading to a possible kernel crash and denial of service. (CVE-2023-3772)

    A flaw was found in the Linux kernel's IP framework for transforming packets (XFRM subsystem). This issue     may allow a malicious user with CAP_NET_ADMIN privileges to cause a 4 byte out-of-bounds read of     XFRMA_MTIMER_THRESH when parsing netlink attributes, leading to potential leakage of sensitive heap data     to userspace. (CVE-2023-3773)

    A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to     achieve local privilege escalation.

    When nf_tables_delrule() is flushing table rules, it is not checked whether the chain is bound and the     chain's owner rule can also release the objects in certain circumstances.

    We recommend upgrading past commit 6eaf41e87a223ae6f8e7a28d6e78384ad7e407f8. (CVE-2023-3777)

    A flaw was found in the XFRM subsystem in the Linux kernel. The specific flaw exists within the processing     of state filters, which can result in a read past the end of an allocated buffer. This flaw allows a local     privileged (CAP_NET_ADMIN) attacker to trigger an out-of-bounds read, potentially leading to an     information disclosure. (CVE-2023-39194)

    A use-after-free flaw was found in the Linux kernel's netfilter in the way a user triggers the     nft_pipapo_remove function with the element, without a NFT_SET_EXT_KEY_END. This issue could allow a local     user to crash the system or potentially escalate their privileges on the system. (CVE-2023-4004)

    A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to     achieve local privilege escalation.

    On an error when building a nftables rule, deactivating immediate expressions in     nft_immediate_deactivate() can lead unbinding the chain and objects be deactivated but later used.

    We recommend upgrading past commit 0a771f7b266b02d262900c75f1e175c7fe76fec2. (CVE-2023-4015)

    A use-after-free flaw was found in net/sched/cls_fw.c in classifiers (cls_fw, cls_u32, and cls_route) in     the Linux Kernel. This flaw allows a local attacker to perform a local privilege escalation due to     incorrect handling of the existing filter, leading to a kernel information leak issue. (CVE-2023-4128)

    netfilter: nf_tables: disallow rule addition to bound chain via NFTA_RULE_CHAIN_ID (CVE-2023-4147)

    A flaw was found in the Linux kernel's TUN/TAP functionality. This issue could allow a local user to     bypass network filters and gain unauthorized access to some resources. The original patches fixing     CVE-2023-1076 are incorrect or incomplete. The problem is that the following upstream commits -     a096ccca6e50 (tun: tun_chr_open(): correctly initialize socket uid), - 66b2c338adce (tap: tap_open():
    correctly initialize socket uid), pass inode->i_uid to sock_init_data_uid() as the last parameter and     that turns out to not be accurate. (CVE-2023-4194)

    A use-after-free vulnerability in the Linux kernel's net/sched: cls_route component can be exploited to     achieve local privilege escalation.

    When route4_change() is called on an existing filter, the whole tcf_result struct is always copied into     the new instance of the filter. This causes a problem when updating a filter bound to a class, as     tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the     still referenced class and allowing it to be deleted, leading to a use-after-free.

    We recommend upgrading past commit b80b829e9e2c1b3f7aae34855e04d8f6ecaf13c8. (CVE-2023-4206)

    A use-after-free vulnerability in the Linux kernel's net/sched: cls_fw component can be exploited to     achieve local privilege escalation.

    When fw_change() is called on an existing filter, the whole tcf_result struct is always copied into the     new instance of the filter. This causes a problem when updating a filter bound to a class, as     tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the     still referenced class and allowing it to be deleted, leading to a use-after-free.

    We recommend upgrading past commit 76e42ae831991c828cffa8c37736ebfb831ad5ec. (CVE-2023-4207)

    A use-after-free vulnerability in the Linux kernel's net/sched: cls_u32 component can be exploited to     achieve local privilege escalation.

    When u32_change() is called on an existing filter, the whole tcf_result struct is always copied into the     new instance of the filter. This causes a problem when updating a filter bound to a class, as     tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the     still referenced class and allowing it to be deleted, leading to a use-after-free.

    We recommend upgrading past commit 3044b16e7c6fe5d24b1cdbcf1bd0a9d92d1ebd81. (CVE-2023-4208)

    A flaw was found in the exFAT driver of the Linux kernel. The vulnerability exists in the implementation     of the file name reconstruction function, which is responsible for reading file name entries from a     directory index and merging file name parts belonging to one file into a single long file name. Since the     file name characters are copied into a stack variable, a local privileged attacker could use this flaw to     overflow the kernel stack. (CVE-2023-4273)

    A memory leak flaw was found in nft_set_catchall_flush in net/netfilter/nf_tables_api.c in the Linux     Kernel. This issue may allow a local attacker to cause double-deactivations of catchall elements, which     can result in a memory leak. (CVE-2023-4569)

    A use-after-free vulnerability in the Linux kernel's af_unix component can be exploited to achieve local     privilege escalation.

    The unix_stream_sendpage() function tries to add data to the last skb in the peer's recv queue without     locking the queue. Thus there is a race where unix_stream_sendpage() could access an skb locklessly that     is being released by garbage collection, resulting in use-after-free.

    We recommend upgrading past commit 790c2f9d15b594350ae9bca7b236f2b1859de02c. (CVE-2023-4622)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
204585	Photon OS 5.0: Linux PHSA-2023-5.0-0101	Nessus	PhotonOS Local Security Checks	high
204357	Photon OS 4.0: Linux PHSA-2023-4.0-0474	Nessus	PhotonOS Local Security Checks	high
194262	RHEL 9 : kernel (RHSA-2023:6583)	Nessus	Red Hat Local Security Checks	high
187935	Ubuntu 20.04 LTS : Linux kernel vulnerabilities (USN-6549-5)	Nessus	Ubuntu Local Security Checks	high
187657	Ubuntu 22.04 LTS : Linux kernel (Intel IoTG) vulnerabilities (USN-6549-4)	Nessus	Ubuntu Local Security Checks	high
186825	Ubuntu 22.04 LTS : Linux kernel vulnerabilities (USN-6534-3)	Nessus	Ubuntu Local Security Checks	high
186823	Ubuntu 20.04 LTS / 22.04 LTS : Linux kernel (Low Latency) vulnerabilities (USN-6549-3)	Nessus	Ubuntu Local Security Checks	high
186758	Ubuntu 23.04 : Linux kernel vulnerabilities (USN-6534-2)	Nessus	Ubuntu Local Security Checks	high
186756	Ubuntu 20.04 LTS / 22.04 LTS : Linux kernel (GKE) vulnerabilities (USN-6549-2)	Nessus	Ubuntu Local Security Checks	high
186742	Ubuntu 20.04 LTS / 22.04 LTS : Linux kernel vulnerabilities (USN-6549-1)	Nessus	Ubuntu Local Security Checks	high
186608	Ubuntu 22.04 LTS / 23.04 : Linux kernel vulnerabilities (USN-6534-1)	Nessus	Ubuntu Local Security Checks	high
185819	Oracle Linux 9 : kernel (ELSA-2023-6583)	Nessus	Oracle Linux Local Security Checks	high
183491	Debian DLA-3623-1 : linux-5.10 - LTS security update	Nessus	Debian Local Security Checks	high
182557	Ubuntu 22.04 LTS : Linux kernel (OEM) vulnerabilities (USN-6415-1)	Nessus	Ubuntu Local Security Checks	critical
181209	Debian DSA-5492-1 : linux - security update	Nessus	Debian Local Security Checks	high
181159	Amazon Linux 2023 : bpftool, kernel, kernel-devel (ALAS2023-2023-330)	Nessus	Amazon Linux Local Security Checks	critical
180567	Amazon Linux 2 : kernel (ALASKERNEL-5.15-2023-026)	Nessus	Amazon Linux Local Security Checks	critical

Detections

Analytics

CVE-2023-3773

medium

Tenable Plugins

high

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critical

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critical

critical