The remote Redhat Enterprise Linux 6 host has one or more packages installed that are affected by multiple vulnerabilities that have been acknowledged by the vendor but will not be patched.

  - kernel: Buffer overflow due to unbounded strcpy in ISDN I4L driver (CVE-2017-12762)

  - kernel: buffer-overflow hardening in WiFi beacon validation code. (CVE-2019-16746)

  - include/linux/init_task.h in the Linux kernel before 2.6.35 does not prevent signals with a process group     ID of zero from reaching the swapper process, which allows local users to cause a denial of service     (system crash) by leveraging access to this process group. (CVE-2010-5328)

Note that Nessus has not tested for these issues but has instead relied on the package manager's report that the package is installed.

The remote Oracle Linux 6 / 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2020-5866 advisory.

  - In the Linux kernel before 4.20.8, kvm_ioctl_create_device in virt/kvm/kvm_main.c mishandles reference     counting because of a race condition, leading to a use-after-free. (CVE-2019-6974)

  - The KVM implementation in the Linux kernel through 4.20.5 has a Use-after-Free. (CVE-2019-7221)

  - The KVM implementation in the Linux kernel through 4.20.5 has an Information Leak. (CVE-2019-7222)

  - A flaw was found in the Linux kernel's NFS41+ subsystem. NFS41+ shares mounted in different network     namespaces at the same time can make bc_svc_process() use wrong back-channel IDs and cause a use-after-     free vulnerability. Thus a malicious container user can cause a host kernel memory corruption and a system     panic. Due to the nature of the flaw, privilege escalation cannot be fully ruled out. (CVE-2018-16884)

  - A flaw that allowed an attacker to corrupt memory and possibly escalate privileges was found in the     mwifiex kernel module while connecting to a malicious wireless network. (CVE-2019-3846)

  - The Linux kernel before 5.1-rc5 allows page->_refcount reference count overflow, with resultant use-after-     free issues, if about 140 GiB of RAM exists. This is related to fs/fuse/dev.c, fs/pipe.c, fs/splice.c,     include/linux/mm.h, include/linux/pipe_fs_i.h, kernel/trace/trace.c, mm/gup.c, and mm/hugetlb.c. It can     occur with FUSE requests. (CVE-2019-11487)

  - An issue was discovered in the Linux kernel before 4.18.7. In block/blk-core.c, there is an
    __blk_drain_queue() use-after-free because a certain error case is mishandled. (CVE-2018-20856)

  - The SCTP socket buffer used by a userspace application is not accounted by the cgroups subsystem. An     attacker can use this flaw to cause a denial of service attack. Kernel 3.10.x and 4.18.x branches are     believed to be vulnerable. (CVE-2019-3874)

  - The fix for CVE-2019-11599, affecting the Linux kernel before 5.0.10 was not complete. A local user could     use this flaw to obtain sensitive information, cause a denial of service, or possibly have other     unspecified impacts by triggering a race condition with mmget_not_zero or get_task_mm calls.
    (CVE-2019-14898)

  - In the Linux kernel before 5.0.6, there is a NULL pointer dereference in drop_sysctl_table() in     fs/proc/proc_sysctl.c, related to put_links, aka CID-23da9588037e. (CVE-2019-20054)

  - An issue was discovered in net/wireless/nl80211.c in the Linux kernel through 5.2.17. It does not check     the length of variable elements in a beacon head, leading to a buffer overflow. (CVE-2019-16746)

  - In the Linux kernel 5.4.0-rc2, there is a use-after-free (read) in the __blk_add_trace function in     kernel/trace/blktrace.c (which is used to fill out a blk_io_trace structure and place it in a per-cpu sub-     buffer). (CVE-2019-19768)

  - In the Linux kernel through 5.4.6, there is a NULL pointer dereference in     drivers/scsi/libsas/sas_discover.c because of mishandling of port disconnection during discovery, related     to a PHY down race condition, aka CID-f70267f379b5. (CVE-2019-19965)

  - In the Linux kernel before 5.1, there is a memory leak in __feat_register_sp() in net/dccp/feat.c, which     may cause denial of service, aka CID-1d3ff0950e2b. (CVE-2019-20096)

  - A flaw was found in the Linux kernel's implementation of some networking protocols in IPsec, such as VXLAN     and GENEVE tunnels over IPv6. When an encrypted tunnel is created between two hosts, the kernel isn't     correctly routing tunneled data over the encrypted link; rather sending the data unencrypted. This would     allow anyone in between the two endpoints to read the traffic unencrypted. The main threat from this     vulnerability is to data confidentiality. (CVE-2020-1749)

  - Memory leaks in drivers/net/wireless/ath/ath9k/htc_hst.c in the Linux kernel through 5.3.11 allow     attackers to cause a denial of service (memory consumption) by triggering wait_for_completion_timeout()     failures. This affects the htc_config_pipe_credits() function, the htc_setup_complete() function, and the     htc_connect_service() function, aka CID-853acf7caf10. (CVE-2019-19073)

  - drivers/media/usb/dvb-usb/technisat-usb2.c in the Linux kernel through 5.2.9 has an out-of-bounds read via     crafted USB device traffic (which may be remote via usbip or usbredir). (CVE-2019-15505)

  - An issue was discovered in the Linux kernel before 5.4.7. The prb_calc_retire_blk_tmo() function in     net/packet/af_packet.c can result in a denial of service (CPU consumption and soft lockup) in a certain     failure case involving TPACKET_V3, aka CID-b43d1f9f7067. (CVE-2019-20812)

  - A flaw was found in the Linux kernels implementation of the invert video code on VGA consoles when a     local attacker attempts to resize the console, calling an ioctl VT_RESIZE, which causes an out-of-bounds     write to occur. This flaw allows a local user with access to the VGA console to crash the system,     potentially escalating their privileges on the system. The highest threat from this vulnerability is to     data confidentiality and integrity as well as system availability. (CVE-2020-14331)

  - fs/btrfs/volumes.c in the Linux kernel before 5.1 allows a btrfs_verify_dev_extents NULL pointer     dereference via a crafted btrfs image because fs_devices->devices is mishandled within find_device, aka     CID-09ba3bc9dd15. (CVE-2019-18885)

  - A buffer over-read flaw was found in RH kernel versions before 5.0 in crypto_authenc_extractkeys in     crypto/authenc.c in the IPsec Cryptographic algorithm's module, authenc. When a payload longer than 4     bytes, and is not following 4-byte alignment boundary guidelines, it causes a buffer over-read threat,     leading to a system crash. This flaw allows a local attacker with user privileges to cause a denial of     service. (CVE-2020-10769)

  - A flaw was found in the Linux kernels SELinux LSM hook implementation before version 5.7, where it     incorrectly assumed that an skb would only contain a single netlink message. The hook would incorrectly     only validate the first netlink message in the skb and allow or deny the rest of the messages within the     skb with the granted permission without further processing. (CVE-2020-10751)

  - An exploitable denial-of-service vulnerability exists in the Linux kernel prior to mainline 5.3. An     attacker could exploit this vulnerability by triggering AP to send IAPP location updates for stations     before the required authentication process has completed. This could lead to different denial-of-service     scenarios, either by causing CAM table attacks, or by leading to traffic flapping if faking already     existing clients in other nearby APs of the same wireless infrastructure. An attacker can forge     Authentication and Association Request packets to trigger this vulnerability. (CVE-2019-5108)

  - An issue was discovered in write_tpt_entry in drivers/infiniband/hw/cxgb4/mem.c in the Linux kernel     through 5.3.2. The cxgb4 driver is directly calling dma_map_single (a DMA function) from a stack variable.
    This could allow an attacker to trigger a Denial of Service, exploitable if this driver is used on an     architecture for which this stack/DMA interaction has security relevance. (CVE-2019-17075)

  - An issue was discovered in the Linux kernel before 5.1.8. There is a NULL pointer dereference caused by a     malicious USB device in the drivers/media/usb/siano/smsusb.c driver. (CVE-2019-15218)

  - A memory leak in the gs_can_open() function in drivers/net/can/usb/gs_usb.c in the Linux kernel before     5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering usb_submit_urb()     failures, aka CID-fb5be6a7b486. (CVE-2019-19052)

  - An issue was discovered in fs/gfs2/rgrp.c in the Linux kernel before 4.8. A use-after-free is caused by     the functions gfs2_clear_rgrpd and read_rindex_entry. (CVE-2016-10905)

  - An issue was discovered in drivers/net/ethernet/arc/emac_main.c in the Linux kernel before 4.5. A use-     after-free is caused by a race condition between the functions arc_emac_tx and arc_emac_tx_clean.
    (CVE-2016-10906)

  - The omninet_open function in drivers/usb/serial/omninet.c in the Linux kernel before 4.10.4 allows local     users to cause a denial of service (tty exhaustion) by leveraging reference count mishandling.
    (CVE-2017-8925)

  - A memory out-of-bounds read flaw was found in the Linux kernel before 5.9-rc2 with the ext3/ext4 file     system, in the way it accesses a directory with broken indexing. This flaw allows a local user to crash     the system if the directory exists. The highest threat from this vulnerability is to system availability.
    (CVE-2020-14314)

  - sound/core/seq_device.c in the Linux kernel before 4.13.4 allows local users to cause a denial of service     (snd_rawmidi_dev_seq_free use-after-free and system crash) or possibly have unspecified other impact via a     crafted USB device. (CVE-2017-16528)

  - The edge_bulk_in_callback function in drivers/usb/serial/io_ti.c in the Linux kernel before 4.10.4 allows     local users to obtain sensitive information (in the dmesg ringbuffer and syslog) from uninitialized kernel     memory by using a crafted USB device (posing as an io_ti USB serial device) to trigger an integer     underflow. (CVE-2017-8924)

  - In driver_override_store and driver_override_show of bus.c, there is a possible double free due to     improper locking. This could lead to local escalation of privilege with System execution privileges     needed. User interaction is not needed for exploitation. Product: Android Versions: Android kernel Android     ID: A-69129004 References: Upstream kernel. (CVE-2018-9415)

  - An issue was discovered in the Linux kernel before 4.20.2. An out-of-bounds access exists in the function     build_audio_procunit in the file sound/usb/mixer.c. (CVE-2019-15927)

  - A flaw was found in the Linux kernel's implementation of GRO in versions before 5.2. This flaw allows an     attacker with local access to crash the system. (CVE-2020-10720)

  - A TOCTOU mismatch in the NFS client code in the Linux kernel before 5.8.3 could be used by local attackers     to corrupt memory or possibly have unspecified other impact because a size check is in fs/nfs/nfs4proc.c     instead of fs/nfs/nfs4xdr.c, aka CID-b4487b935452. (CVE-2020-25212)

  - The rbd block device driver in drivers/block/rbd.c in the Linux kernel through 5.8.9 used incomplete     permission checking for access to rbd devices, which could be leveraged by local attackers to map or unmap     rbd block devices, aka CID-f44d04e696fe. (CVE-2020-25284)

  - A race condition between hugetlb sysctl handlers in mm/hugetlb.c in the Linux kernel before 5.8.8 could be     used by local attackers to corrupt memory, cause a NULL pointer dereference, or possibly have unspecified     other impact, aka CID-17743798d812. (CVE-2020-25285)

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

The SUSE Linux Enterprise 12 GA LTS kernel was updated to receive various security and bugfixes. The following security bugs were fixed :

  - CVE-2017-15649: net/packet/af_packet.c in the Linux     kernel allowed local users to gain privileges via     crafted system calls that trigger mishandling of     packet_fanout data structures, because of a race     condition (involving fanout_add and packet_do_bind) that     leads to a use-after-free, a different vulnerability     than CVE-2017-6346 (bnc#1064388).

  - CVE-2015-9004: kernel/events/core.c in the Linux kernel     mishandled counter grouping, which allowed local users     to gain privileges via a crafted application, related to     the perf_pmu_register and perf_event_open functions     (bnc#1037306).

  - CVE-2016-10229: udp.c in the Linux kernel allowed remote     attackers to execute arbitrary code via UDP traffic that     triggers an unsafe second checksum calculation during     execution of a recv system call with the MSG_PEEK flag     (bnc#1032268).

  - CVE-2016-9604: The handling of keyrings starting with     '.' in KEYCTL_JOIN_SESSION_KEYRING, which could have     allowed local users to manipulate privileged keyrings,     was fixed (bsc#1035576)

  - CVE-2017-1000363: Linux drivers/char/lp.c Out-of-Bounds     Write. Due to a missing bounds check, and the fact that     parport_ptr integer is static, a 'secure boot' kernel     command line adversary (can happen due to bootloader     vulns, e.g. Google Nexus 6's CVE-2016-10277, where due     to a vulnerability the adversary has partial control     over the command line) can overflow the parport_nr array     in the following code, by appending many (>LP_NO)     'lp=none' arguments to the command line (bnc#1039456).

  - CVE-2017-1000365: The Linux Kernel imposes a size     restriction on the arguments and environmental strings     passed through RLIMIT_STACK/RLIM_INFINITY (1/4 of the     size), but did not take the argument and environment     pointers into account, which allowed attackers to bypass     this limitation. (bnc#1039354).

  - CVE-2017-1000380: sound/core/timer.c in the Linux kernel     is vulnerable to a data race in the ALSA /dev/snd/timer     driver resulting in local users being able to read     information belonging to other users, i.e.,     uninitialized memory contents may be disclosed when a     read and an ioctl happen at the same time (bnc#1044125).

  - CVE-2017-10661: Race condition in fs/timerfd.c in the     Linux kernel allowed local users to gain privileges or     cause a denial of service (list corruption or     use-after-free) via simultaneous file-descriptor     operations that leverage improper might_cancel queueing     (bnc#1053152).

  - CVE-2017-11176: The mq_notify function in the Linux     kernel did not set the sock pointer to NULL upon entry     into the retry logic. During a user-space close of a     Netlink socket, it allowed attackers to cause a denial     of service (use-after-free) or possibly have unspecified     other impact (bnc#1048275).

  - CVE-2017-12153: A security flaw was discovered in the     nl80211_set_rekey_data() function in     net/wireless/nl80211.c in the Linux kernel This function     did not check whether the required attributes are     present in a Netlink request. This request can be issued     by a user with the CAP_NET_ADMIN capability and may     result in a NULL pointer dereference and system crash     (bnc#1058410).

  - CVE-2017-12154: The prepare_vmcs02 function in     arch/x86/kvm/vmx.c in the Linux kernel did not ensure     that the 'CR8-load exiting' and 'CR8-store exiting' L0     vmcs02 controls exist in cases where L1 omits the 'use     TPR shadow' vmcs12 control, which allowed KVM L2 guest     OS users to obtain read and write access to the hardware     CR8 register (bnc#1058507).

  - CVE-2017-12762: In /drivers/isdn/i4l/isdn_net.c: A     user-controlled buffer is copied into a local buffer of     constant size using strcpy without a length check which     can cause a buffer overflow. (bnc#1053148).

  - CVE-2017-13080: Wi-Fi Protected Access (WPA and WPA2)     allowed reinstallation of the Group Temporal Key (GTK)     during the group key handshake, allowing an attacker     within radio range to replay frames from access points     to clients (bnc#1063667).

  - CVE-2017-14051: An integer overflow in the     qla2x00_sysfs_write_optrom_ctl function in     drivers/scsi/qla2xxx/qla_attr.c in the Linux kernel     allowed local users to cause a denial of service (memory     corruption and system crash) by leveraging root access     (bnc#1056588).

  - CVE-2017-14106: The tcp_disconnect function in     net/ipv4/tcp.c in the Linux kernel allowed local users     to cause a denial of service (__tcp_select_window     divide-by-zero error and system crash) by triggering a     disconnect within a certain tcp_recvmsg code path     (bnc#1056982).

  - CVE-2017-14140: The move_pages system call in     mm/migrate.c in the Linux kernel doesn't check the     effective uid of the target process, enabling a local     attacker to learn the memory layout of a setuid     executable despite ASLR (bnc#1057179).

  - CVE-2017-15265: Use-after-free vulnerability in the     Linux kernel allowed local users to have unspecified     impact via vectors related to /dev/snd/seq     (bnc#1062520).

  - CVE-2017-15274: security/keys/keyctl.c in the Linux     kernel did not consider the case of a NULL payload in     conjunction with a nonzero length value, which allowed     local users to cause a denial of service (NULL pointer     dereference and OOPS) via a crafted add_key or keyctl     system call, a different vulnerability than     CVE-2017-12192 (bnc#1045327).

  - CVE-2017-2647: The KEYS subsystem in the Linux kernel     allowed local users to gain privileges or cause a denial     of service (NULL pointer dereference and system crash)     via vectors involving a NULL value for a certain match     field, related to the keyring_search_iterator function     in keyring.c (bnc#1030593).

  - CVE-2017-6951: The keyring_search_aux function in     security/keys/keyring.c in the Linux kernel allowed     local users to cause a denial of service (NULL pointer     dereference and OOPS) via a request_key system call for     the 'dead' type (bnc#1029850).

  - CVE-2017-7482: A potential memory corruption was fixed     in decoding of krb5 principals in the kernels kerberos     handling. (bnc#1046107).

  - CVE-2017-7487: The ipxitf_ioctl function in     net/ipx/af_ipx.c in the Linux kernel mishandled     reference counts, which allowed local users to cause a     denial of service (use-after-free) or possibly have     unspecified other impact via a failed SIOCGIFADDR ioctl     call for an IPX interface (bnc#1038879).

  - CVE-2017-7518: The Linux kernel was vulnerable to an     incorrect debug exception(#DB) error. It could occur     while emulating a syscall instruction and potentially     lead to guest privilege escalation. (bsc#1045922).

  - CVE-2017-7541: The brcmf_cfg80211_mgmt_tx function in     drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg8021     1.c in the Linux kernel allowed local users to cause a     denial of service (buffer overflow and system crash) or     possibly gain privileges via a crafted NL80211_CMD_FRAME     Netlink packet (bnc#1049645).

  - CVE-2017-7542: The ip6_find_1stfragopt function in     net/ipv6/output_core.c in the Linux kernel allowed local     users to cause a denial of service (integer overflow and     infinite loop) by leveraging the ability to open a raw     socket (bnc#1049882).

  - CVE-2017-7889: The mm subsystem in the Linux kernel did     not properly enforce the CONFIG_STRICT_DEVMEM protection     mechanism, which allowed local users to read or write to     kernel memory locations in the first megabyte (and     bypass slab-allocation access restrictions) via an     application that opens the /dev/mem file, related to     arch/x86/mm/init.c and drivers/char/mem.c (bnc#1034405).

  - CVE-2017-8106: The handle_invept function in     arch/x86/kvm/vmx.c in the Linux kernel 3.12 allowed     privileged KVM guest OS users to cause a denial of     service (NULL pointer dereference and host OS crash) via     a single-context INVEPT instruction with a NULL EPT     pointer (bnc#1035877).

  - CVE-2017-8831: The saa7164_bus_get function in     drivers/media/pci/saa7164/saa7164-bus.c in the Linux     kernel allowed local users to cause a denial of service     (out-of-bounds array access) or possibly have     unspecified other impact by changing a certain     sequence-number value, aka a 'double fetch'     vulnerability (bnc#1037994).

  - CVE-2017-8890: The inet_csk_clone_lock function in     net/ipv4/inet_connection_sock.c in the Linux kernel     allowed attackers to cause a denial of service (double     free) or possibly have unspecified other impact by     leveraging use of the accept system call (bnc#1038544).

  - CVE-2017-8924: The edge_bulk_in_callback function in     drivers/usb/serial/io_ti.c in the Linux kernel allowed     local users to obtain sensitive information (in the     dmesg ringbuffer and syslog) from uninitialized kernel     memory by using a crafted USB device (posing as an io_ti     USB serial device) to trigger an integer underflow     (bnc#1037182 bsc#1038982).

  - CVE-2017-8925: The omninet_open function in     drivers/usb/serial/omninet.c in the Linux kernel allowed     local users to cause a denial of service (tty     exhaustion) by leveraging reference count mishandling     (bnc#1037183 bsc#1038981).

  - CVE-2017-9074: The IPv6 fragmentation implementation in     the Linux kernel did not consider that the nexthdr field     may be associated with an invalid option, which allowed     local users to cause a denial of service (out-of-bounds     read and BUG) or possibly have unspecified other impact     via crafted socket and send system calls (bnc#1039882).

  - CVE-2017-9075: The sctp_v6_create_accept_sk function in     net/sctp/ipv6.c in the Linux kernel mishandled     inheritance, which allowed local users to cause a denial     of service or possibly have unspecified other impact via     crafted system calls, a related issue to CVE-2017-8890     (bnc#1039883).

  - CVE-2017-9076: The dccp_v6_request_recv_sock function in     net/dccp/ipv6.c in the Linux kernel mishandled     inheritance, which allowed local users to cause a denial     of service or possibly have unspecified other impact via     crafted system calls, a related issue to CVE-2017-8890     (bnc#1039885).

  - CVE-2017-9077: The tcp_v6_syn_recv_sock function in     net/ipv6/tcp_ipv6.c in the Linux kernel mishandled     inheritance, which allowed local users to cause a denial     of service or possibly have unspecified other impact via     crafted system calls, a related issue to CVE-2017-8890     (bnc#1040069).

  - CVE-2017-9242: The __ip6_append_data function in     net/ipv6/ip6_output.c in the Linux kernel is too late in     checking whether an overwrite of an skb data structure     may occur, which allowed local users to cause a denial     of service (system crash) via crafted system calls     (bnc#1041431).

The update package also includes non-security fixes. See advisory for details.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Published	Updated	Severity
199273	RHEL 6 : kernel (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	6/3/2024	6/14/2024	critical
141207	Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2020-5866)	Nessus	Oracle Linux Local Security Checks	10/6/2020	2/16/2024	critical
104374	SUSE SLES12 Security Update : kernel (SUSE-SU-2017:2920-1) (KRACK) (Stack Clash)	Nessus	SuSE Local Security Checks	11/3/2017	1/6/2021	critical

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