A flaw possibility of race condition and incorrect initialization of the process id was found in the Linux kernel child/parent process identification handling while filtering signal handlers. A local attacker is able to abuse this flaw to bypass checks to send any signal to a privileged process.

The remote AlmaLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2021:1578 advisory.

  - A memory leak in the sof_set_get_large_ctrl_data() function in sound/soc/sof/ipc.c in the Linux kernel     through 5.3.9 allows attackers to cause a denial of service (memory consumption) by triggering     sof_get_ctrl_copy_params() failures, aka CID-45c1380358b1. (CVE-2019-18811)

  - In the Linux kernel before 5.3.7, there is a use-after-free bug that can be caused by a malicious USB     device in the drivers/usb/misc/adutux.c driver, aka CID-44efc269db79. (CVE-2019-19523)

  - In the Linux kernel before 5.3.7, there is a use-after-free bug that can be caused by a malicious USB     device in the drivers/usb/misc/iowarrior.c driver, aka CID-edc4746f253d. (CVE-2019-19528)

  - In kbd_keycode of keyboard.c, there is a possible out of bounds write due to a missing bounds check. This     could lead to local escalation of privilege with no additional execution privileges needed. User     interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-144161459     (CVE-2020-0431)

  - An issue was discovered in the Linux kernel before 5.6.1. drivers/media/usb/gspca/ov519.c allows NULL     pointer dereferences in ov511_mode_init_regs and ov518_mode_init_regs when there are zero endpoints, aka     CID-998912346c0d. (CVE-2020-11608)

  - A pivot_root race condition in fs/namespace.c in the Linux kernel 4.4.x before 4.4.221, 4.9.x before     4.9.221, 4.14.x before 4.14.178, 4.19.x before 4.19.119, and 5.x before 5.3 allows local users to cause a     denial of service (panic) by corrupting a mountpoint reference counter. (CVE-2020-12114)

  - Integer overflow in the firmware for some Intel(R) Graphics Drivers for Windows * before version     26.20.100.7212 and before Linux kernel version 5.5 may allow a privileged user to potentially enable an     escalation of privilege via local access. (CVE-2020-12362)

  - Improper input validation in some Intel(R) Graphics Drivers for Windows* before version 26.20.100.7212 and     before Linux kernel version 5.5 may allow a privileged user to potentially enable a denial of service via     local access. (CVE-2020-12363)

  - Null pointer reference in some Intel(R) Graphics Drivers for Windows* before version 26.20.100.7212 and     before version Linux kernel version 5.5 may allow a privileged user to potentially enable a denial of     service via local access. (CVE-2020-12364)

  - usb_sg_cancel in drivers/usb/core/message.c in the Linux kernel before 5.6.8 has a use-after-free because     a transfer occurs without a reference, aka CID-056ad39ee925. (CVE-2020-12464)

  - 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)

  - A flaw null pointer dereference in the Linux kernel cgroupv2 subsystem in versions before 5.7.10 was found     in the way when reboot the system. A local user could use this flaw to crash the system or escalate their     privileges on the system. (CVE-2020-14356)

  - The Linux kernel before version 5.8 is vulnerable to a NULL pointer dereference in     drivers/tty/serial/8250/8250_core.c:serial8250_isa_init_ports() that allows local users to cause a denial     of service by using the p->serial_in pointer which uninitialized. (CVE-2020-15437)

  - In the Linux kernel before 5.7.8, fs/nfsd/vfs.c (in the NFS server) can set incorrect permissions on new     filesystem objects when the filesystem lacks ACL support, aka CID-22cf8419f131. This occurs because the     current umask is not considered. (CVE-2020-24394)

  - 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)

  - A flaw was found in the HDLC_PPP module of the Linux kernel in versions before 5.9-rc7. Memory corruption     and a read overflow is caused by improper input validation in the ppp_cp_parse_cr function which can cause     the system to crash or cause a denial of service. The highest threat from this vulnerability is to data     confidentiality and integrity as well as system availability. (CVE-2020-25643)

  - A flaw memory leak in the Linux kernel performance monitoring subsystem was found in the way if using     PERF_EVENT_IOC_SET_FILTER. A local user could use this flaw to starve the resources causing denial of     service. (CVE-2020-25704)

  - A flaw was found in the Linux kernel's implementation of MIDI, where an attacker with a local account and     the permissions to issue ioctl commands to midi devices could trigger a use-after-free issue. A write to     this specific memory while freed and before use causes the flow of execution to change and possibly allow     for memory corruption or privilege escalation. The highest threat from this vulnerability is to     confidentiality, integrity, as well as system availability. (CVE-2020-27786)

  - A use after free in the Linux kernel infiniband hfi1 driver in versions prior to 5.10-rc6 was found in the     way user calls Ioctl after open dev file and fork. A local user could use this flaw to crash the system.
    (CVE-2020-27835)

  - A slab-out-of-bounds read in fbcon in the Linux kernel before 5.9.7 could be used by local attackers to     read privileged information or potentially crash the kernel, aka CID-3c4e0dff2095. This occurs because     KD_FONT_OP_COPY in drivers/tty/vt/vt.c can be used for manipulations such as font height. (CVE-2020-28974)

  - A flaw possibility of race condition and incorrect initialization of the process id was found in the Linux     kernel child/parent process identification handling while filtering signal handlers. A local attacker is     able to abuse this flaw to bypass checks to send any signal to a privileged process. (CVE-2020-35508)

  - An issue was discovered in the FUSE filesystem implementation in the Linux kernel before 5.10.6, aka     CID-5d069dbe8aaf. fuse_do_getattr() calls make_bad_inode() in inappropriate situations, causing a system     crash. NOTE: the original fix for this vulnerability was incomplete, and its incompleteness is tracked as     CVE-2021-28950. (CVE-2020-36322)

  - In tun_get_user of tun.c, there is possible memory corruption due to a use after free. This could lead to     local escalation of privilege with System execution privileges required. User interaction is not required     for exploitation. Product: Android; Versions: Android kernel; Android ID: A-146554327. (CVE-2021-0342)

  - In pfkey_dump of af_key.c, there is a possible out-of-bounds read due to a missing bounds check. This     could lead to local information disclosure in the kernel with System execution privileges needed. User     interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-110373476     (CVE-2021-0605)

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

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:2718 advisory.

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

    Security Fix(es):

    * kernel: size_t-to-int conversion vulnerability in the filesystem layer (CVE-2021-33909)

    * kernel: use-after-free in net/bluetooth/hci_event.c when destroying an hci_chan (CVE-2021-33034)

    * kernel: perf_event_parse_addr_filter memory (CVE-2020-25704)

    * kernel: security bypass in certs/blacklist.c and certs/system_keyring.c (CVE-2020-26541)

    * kernel: fork: fix copy_process(CLONE_PARENT) race with the exiting ->real_parent (CVE-2020-35508)

    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.

    Bug Fix(es):

    * RHEL8.2 Snapshot2 -  tpm: ibmvtpm: Wait for buffer to be set before proceeding (BZ#1933986)

    * fnic crash from invalid request pointer (BZ#1961707)

    * [Azure][RHEL8.4] Two Patches Needed To Enable Azure Host Time-syncing in VMs (BZ#1963051)

    * RHEL kernel 8.2 and higher are affected by data corruption bug in raid1 arrays using bitmaps.
    (BZ#1969338)

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 Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:2719 advisory.

    The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with     extremely high determinism requirements.

    Security Fix(es):

    * kernel: size_t-to-int conversion vulnerability in the filesystem layer (CVE-2021-33909)

    * kernel: use-after-free in net/bluetooth/hci_event.c when destroying an hci_chan (CVE-2021-33034)

    * kernel: perf_event_parse_addr_filter memory (CVE-2020-25704)

    * kernel: security bypass in certs/blacklist.c and certs/system_keyring.c (CVE-2020-26541)

    * kernel: fork: fix copy_process(CLONE_PARENT) race with the exiting ->real_parent (CVE-2020-35508)

    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.

    Bug Fix(es):

    * kernel-rt: update RT source tree to the latest RHEL-8.2.z10 Batch source tree (BZ#1968022)

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 OracleVM system is missing necessary patches to address security updates:

  - In various methods of hid-multitouch.c, there is a possible out of bounds write due to a missing bounds     check. This could lead to local escalation of privilege with no additional execution privileges needed.
    User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID:
    A-162844689References: Upstream kernel (CVE-2020-0465)

  - In do_epoll_ctl and ep_loop_check_proc of eventpoll.c, there is a possible use after free due to a logic     error. This could lead to local escalation of privilege with no additional execution privileges needed.
    User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID:
    A-147802478References: Upstream kernel (CVE-2020-0466)

  - A flaw possibility of race condition and incorrect initialization of the process id was found in the Linux     kernel child/parent process identification handling while filtering signal handlers. A local attacker is     able to abuse this flaw to bypass checks to send any signal to a privileged process. (CVE-2020-35508)

  - A denial of service vulnerability was found in n_tty_receive_char_special in drivers/tty/n_tty.c of the     Linux kernel. In this flaw a local attacker with a normal user privilege could delay the loop (due to a     changing ldata->read_head, and a missing sanity check) and cause a threat to the system availability.
    (CVE-2021-20219)

  - A race condition was found in the Linux kernels implementation of the floppy disk drive controller driver     software. The impact of this issue is lessened by the fact that the default permissions on the floppy     device (/dev/fd0) are restricted to root. If the permissions on the device have changed the impact changes     greatly. In the default configuration root (or equivalent) permissions are required to attack this flaw.
    (CVE-2021-20261)

  - An issue was discovered in the Linux kernel through 5.11.3, as used with Xen PV. A certain part of the     netback driver lacks necessary treatment of errors such as failed memory allocations (as a result of     changes to the handling of grant mapping errors). A host OS denial of service may occur during misbehavior     of a networking frontend driver. NOTE: this issue exists because of an incomplete fix for CVE-2021-26931.
    (CVE-2021-28038)

  - The fix for XSA-365 includes initialization of pointers such that subsequent cleanup code wouldn't use     uninitialized or stale values. This initialization went too far and may under certain conditions also     overwrite pointers which are in need of cleaning up. The lack of cleanup would result in leaking     persistent grants. The leak in turn would prevent fully cleaning up after a respective guest has died,     leaving around zombie domains. All Linux versions having the fix for XSA-365 applied are vulnerable.
    XSA-365 was classified to affect versions back to at least 3.11. (CVE-2021-28688)

  - A race condition was discovered in get_old_root in fs/btrfs/ctree.c in the Linux kernel through 5.11.8. It     allows attackers to cause a denial of service (BUG) because of a lack of locking on an extent buffer     before a cloning operation, aka CID-dbcc7d57bffc. (CVE-2021-28964)

  - An issue was discovered in the Linux kernel before 5.11.11. The netfilter subsystem allows attackers to     cause a denial of service (panic) because net/netfilter/x_tables.c and include/linux/netfilter/x_tables.h     lack a full memory barrier upon the assignment of a new table value, aka CID-175e476b8cdf.
    (CVE-2021-29650)

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 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2021-1578 advisory.

    - drm/i915/guc: Update to use firmware v49.0.1 (Dave Airlie) [1935281] {CVE-2020-12362}
    - scsi: iscsi: Verify lengths on passthrough PDUs (Chris Leech) [1930833] {CVE-2021-27365}
    - scsi: iscsi: Ensure sysfs attributes are limited to PAGE_SIZE (Chris Leech) [1930856] {CVE-2021-27363}
    - scsi: iscsi: Restrict sessions and handles to admin capabilities (Chris Leech) [1930809]     {CVE-2021-27364}
    - vt: Disable KD_FONT_OP_COPY (Dave Airlie) [1903937] {CVE-2020-28974}
    - fix regression in 'epoll: Keep a reference on files added to the check list' (Carlos Maiolino) [1920776]     {CVE-2020-0466}
    - do_epoll_ctl(): clean the failure exits up a bit (Carlos Maiolino) [1920776] {CVE-2020-0466}
    - epoll: Keep a reference on files added to the check list (Carlos Maiolino) [1920776] {CVE-2020-0466}
    - net/vmw_vsock: fix NULL pointer dereference (Jon Maloy) [1925600] {CVE-2021-26708}
    - net/vmw_vsock: improve locking in vsock_connect_timeout() (Jon Maloy) [1925600] {CVE-2021-26708}
    - vsock: fix locking in vsock_shutdown() (Jon Maloy) [1925600] {CVE-2021-26708}
    - vsock: fix the race conditions in multi-transport support (Jon Maloy) [1925600] {CVE-2021-26708}

Tenable has extracted the preceding description block directly from the Oracle 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 CentOS Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the CESA-2021:1578 advisory.

  - kernel: memory leak in sof_set_get_large_ctrl_data() function in sound/soc/sof/ipc.c (CVE-2019-18811)

  - kernel: use-after-free caused by a malicious USB device in the drivers/usb/misc/adutux.c driver     (CVE-2019-19523)

  - kernel: use-after-free bug caused by a malicious USB device in the drivers/usb/misc/iowarrior.c driver     (CVE-2019-19528)

  - kernel: possible out of bounds write in kbd_keycode of keyboard.c (CVE-2020-0431)

  - kernel: NULL pointer dereferences in ov511_mode_init_regs and ov518_mode_init_regs in     drivers/media/usb/gspca/ov519.c (CVE-2020-11608)

  - kernel: DoS by corrupting mountpoint reference counter (CVE-2020-12114)

  - kernel: Integer overflow in Intel(R) Graphics Drivers (CVE-2020-12362)

  - kernel: use-after-free in usb_sg_cancel function in drivers/usb/core/message.c (CVE-2020-12464)

  - kernel: buffer uses out of index in ext3/4 filesystem (CVE-2020-14314)

  - kernel: Use After Free vulnerability in cgroup BPF component (CVE-2020-14356)

  - kernel: NULL pointer dereference in serial8250_isa_init_ports function in     drivers/tty/serial/8250/8250_core.c (CVE-2020-15437)

  - kernel: umask not applied on filesystem without ACL support (CVE-2020-24394)

  - kernel: TOCTOU mismatch in the NFS client code (CVE-2020-25212)

  - kernel: incomplete permission checking for access to rbd devices (CVE-2020-25284)

  - kernel: race condition between hugetlb sysctl handlers in mm/hugetlb.c (CVE-2020-25285)

  - kernel: improper input validation in ppp_cp_parse_cr function leads to memory corruption and read overflow     (CVE-2020-25643)

  - kernel: perf_event_parse_addr_filter memory (CVE-2020-25704)

  - kernel: use-after-free in kernel midi subsystem (CVE-2020-27786)

  - kernel: child process is able to access parent mm through hfi dev file handle (CVE-2020-27835)

  - kernel: slab-out-of-bounds read in fbcon (CVE-2020-28974)

  - kernel: fork: fix copy_process(CLONE_PARENT) race with the exiting ->real_parent (CVE-2020-35508)

  - kernel: fuse: fuse_do_getattr() calls make_bad_inode() in inappropriate situations (CVE-2020-36322)

  - kernel: use after free in tun_get_user of tun.c could lead to local escalation of privilege     (CVE-2021-0342)

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

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:1578 advisory.

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

    Security Fix(es):

    * kernel: Integer overflow in Intel(R) Graphics Drivers (CVE-2020-12362)

    * kernel: memory leak in sof_set_get_large_ctrl_data() function in sound/soc/sof/ipc.c (CVE-2019-18811)

    * kernel: use-after-free caused by a malicious USB device in the drivers/usb/misc/adutux.c driver     (CVE-2019-19523)

    * kernel: use-after-free bug caused by a malicious USB device in the drivers/usb/misc/iowarrior.c driver     (CVE-2019-19528)

    * kernel: possible out of bounds write in kbd_keycode of keyboard.c (CVE-2020-0431)

    * kernel: DoS by corrupting mountpoint reference counter (CVE-2020-12114)

    * kernel: use-after-free in usb_sg_cancel function in drivers/usb/core/message.c (CVE-2020-12464)

    * kernel: buffer uses out of index in ext3/4 filesystem (CVE-2020-14314)

    * kernel: Use After Free vulnerability in cgroup BPF component (CVE-2020-14356)

    * kernel: NULL pointer dereference in serial8250_isa_init_ports function in     drivers/tty/serial/8250/8250_core.c (CVE-2020-15437)

    * kernel: umask not applied on filesystem without ACL support (CVE-2020-24394)

    * kernel: TOCTOU mismatch in the NFS client code (CVE-2020-25212)

    * kernel: incomplete permission checking for access to rbd devices (CVE-2020-25284)

    * kernel: race condition between hugetlb sysctl handlers in mm/hugetlb.c (CVE-2020-25285)

    * kernel: improper input validation in ppp_cp_parse_cr function leads to memory corruption and read     overflow (CVE-2020-25643)

    * kernel: perf_event_parse_addr_filter memory (CVE-2020-25704)

    * kernel: use-after-free in kernel midi subsystem (CVE-2020-27786)

    * kernel: child process is able to access parent mm through hfi dev file handle (CVE-2020-27835)

    * kernel: slab-out-of-bounds read in fbcon (CVE-2020-28974)

    * kernel: fork: fix copy_process(CLONE_PARENT) race with the exiting ->real_parent (CVE-2020-35508)

    * kernel: fuse: fuse_do_getattr() calls make_bad_inode() in inappropriate situations (CVE-2020-36322)

    * kernel: use after free in tun_get_user of tun.c could lead to local escalation of privilege     (CVE-2021-0342)

    * kernel: NULL pointer dereferences in ov511_mode_init_regs and ov518_mode_init_regs in     drivers/media/usb/gspca/ov519.c (CVE-2020-11608)

    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 8.4 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 Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:1739 advisory.

    The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with     extremely high determinism requirements.

    Security Fix(es):

    * kernel: Integer overflow in Intel(R) Graphics Drivers (CVE-2020-12362)

    * kernel: use-after-free caused by a malicious USB device in the drivers/usb/misc/adutux.c driver     (CVE-2019-19523)

    * kernel: use-after-free bug caused by a malicious USB device in the drivers/usb/misc/iowarrior.c driver     (CVE-2019-19528)

    * kernel: possible out of bounds write in kbd_keycode of keyboard.c (CVE-2020-0431)

    * kernel: DoS by corrupting mountpoint reference counter (CVE-2020-12114)

    * kernel: use-after-free in usb_sg_cancel function in drivers/usb/core/message.c (CVE-2020-12464)

    * kernel: buffer uses out of index in ext3/4 filesystem (CVE-2020-14314)

    * kernel: Use After Free vulnerability in cgroup BPF component (CVE-2020-14356)

    * kernel: NULL pointer dereference in serial8250_isa_init_ports function in     drivers/tty/serial/8250/8250_core.c (CVE-2020-15437)

    * kernel: umask not applied on filesystem without ACL support (CVE-2020-24394)

    * kernel: TOCTOU mismatch in the NFS client code (CVE-2020-25212)

    * kernel: incomplete permission checking for access to rbd devices (CVE-2020-25284)

    * kernel: race condition between hugetlb sysctl handlers in mm/hugetlb.c (CVE-2020-25285)

    * kernel: improper input validation in ppp_cp_parse_cr function leads to memory corruption and read     overflow (CVE-2020-25643)

    * kernel: perf_event_parse_addr_filter memory (CVE-2020-25704)

    * kernel: use-after-free in kernel midi subsystem (CVE-2020-27786)

    * kernel: child process is able to access parent mm through hfi dev file handle (CVE-2020-27835)

    * kernel: slab-out-of-bounds read in fbcon (CVE-2020-28974)

    * kernel: fork: fix copy_process(CLONE_PARENT) race with the exiting ->real_parent (CVE-2020-35508)

    * kernel: use after free in tun_get_user of tun.c could lead to local escalation of privilege     (CVE-2021-0342)

    * kernel: NULL pointer dereferences in ov511_mode_init_regs and ov518_mode_init_regs in     drivers/media/usb/gspca/ov519.c (CVE-2020-11608)

    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 8.4 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 Oracle Linux 6 / 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2021-9215 advisory.

    - btrfs: fix race when cloning extent buffer during rewind of an old root (Filipe Manana)  [Orabug:
    32669454]  {CVE-2021-28964}
    - xen-blkback: don't leak persistent grants from xen_blkbk_map() (Jan Beulich)  [Orabug: 32697855]     {CVE-2021-28688}
    - netfilter: x_tables: Use correct memory barriers. (Mark Tomlinson)  [Orabug: 32709125]  {CVE-2021-29650}
    - netfilter: x_tables: make xt_replace_table wait until old rules are not used anymore (Florian Westphal)     [Orabug: 32709125]  {CVE-2021-29650}
    - do_epoll_ctl(): clean the failure exits up a bit (Al Viro)  [Orabug: 32759496]  {CVE-2020-0466}
    - epoll: Keep a reference on files added to the check list (Marc Zyngier)  [Orabug: 32759496]     {CVE-2020-0466}
    - HID: core: Sanitize event code and type when mapping input (Marc Zyngier)  [Orabug: 32759553]     {CVE-2020-0465}
    - floppy: fix lock_fdc() signal handling (Jiri Kosina)  [Orabug: 32624116]  {CVE-2021-20261}
    - Xen/gnttab: handle p2m update errors on a per-slot basis (Jan Beulich)  [Orabug: 32651478]     {CVE-2021-28038}
    - n_tty: Fix stall at n_tty_receive_char_special(). (Tetsuo Handa)  [Orabug: 32656942]  {CVE-2021-20219}
    - fork: fix copy_process(CLONE_PARENT) race with the exiting ->real_parent (Eddy Wu)  [Orabug: 32695783]     {CVE-2020-35508}

Tenable has extracted the preceding description block directly from the Oracle 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-4752-1 advisory.

    Daniele Antonioli, Nils Ole Tippenhauer, and Kasper Rasmussen discovered that legacy pairing and secure-     connections pairing authentication in the Bluetooth protocol could allow an unauthenticated user to     complete authentication without pairing credentials via adjacent access. A physically proximate attacker     could use this to impersonate a previously paired Bluetooth device. (CVE-2020-10135)

    Jay Shin discovered that the ext4 file system implementation in the Linux kernel did not properly handle     directory access with broken indexing, leading to an out-of-bounds read vulnerability. A local attacker     could use this to cause a denial of service (system crash). (CVE-2020-14314)

    It was discovered that the block layer implementation in the Linux kernel did not properly perform     reference counting in some situations, leading to a use-after-free vulnerability. A local attacker could     use this to cause a denial of service (system crash). (CVE-2020-15436)

    It was discovered that the serial port driver in the Linux kernel did not properly initialize a pointer in     some situations. A local attacker could possibly use this to cause a denial of service (system crash).
    (CVE-2020-15437)

    Andy Nguyen discovered that the Bluetooth HCI event packet parser in the Linux kernel did not properly     handle event advertisements of certain sizes, leading to a heap-based buffer overflow. A physically     proximate remote attacker could use this to cause a denial of service (system crash) or possibly execute     arbitrary code. (CVE-2020-24490)

    It was discovered that the NFS client implementation in the Linux kernel did not properly perform bounds     checking before copying security labels in some situations. A local attacker could use this to cause a     denial of service (system crash) or possibly execute arbitrary code. (CVE-2020-25212)

    It was discovered that the Rados block device (rbd) driver in the Linux kernel did not properly perform     privilege checks for access to rbd devices in some situations. A local attacker could use this to map or     unmap rbd block devices. (CVE-2020-25284)

    It was discovered that the block layer subsystem in the Linux kernel did not properly handle zero-length     requests. A local attacker could use this to cause a denial of service. (CVE-2020-25641)

    It was discovered that the HDLC PPP implementation in the Linux kernel did not properly validate input in     some situations. A local attacker could use this to cause a denial of service (system crash) or possibly     execute arbitrary code. (CVE-2020-25643)

    Kiyin () discovered that the perf subsystem in the Linux kernel did not properly deallocate memory     in some situations. A privileged attacker could use this to cause a denial of service (kernel memory     exhaustion). (CVE-2020-25704)

    It was discovered that the KVM hypervisor in the Linux kernel did not properly handle interrupts in     certain situations. A local attacker in a guest VM could possibly use this to cause a denial of service     (host system crash). (CVE-2020-27152)

    It was discovered that the jfs file system implementation in the Linux kernel contained an out-of-bounds     read vulnerability. A local attacker could use this to possibly cause a denial of service (system crash).
    (CVE-2020-27815)

    It was discovered that an information leak existed in the syscall implementation in the Linux kernel on 32     bit systems. A local attacker could use this to expose sensitive information (kernel memory).
    (CVE-2020-28588)

    It was discovered that the framebuffer implementation in the Linux kernel did not properly perform range     checks in certain situations. A local attacker could use this to expose sensitive information (kernel     memory). (CVE-2020-28915)

    Jann Horn discovered a race condition in the copy-on-write implementation in the Linux kernel when     handling hugepages. A local attacker could use this to gain unintended write access to read-only memory     pages. (CVE-2020-29368)

    Jann Horn discovered that the mmap implementation in the Linux kernel contained a race condition when     handling munmap() operations, leading to a read-after-free vulnerability. A local attacker could use this     to cause a denial of service (system crash) or possibly expose sensitive information. (CVE-2020-29369)

    Jann Horn discovered that the romfs file system in the Linux kernel did not properly validate file system     meta-data, leading to an out-of-bounds read. An attacker could use this to construct a malicious romfs     image that, when mounted, exposed sensitive information (kernel memory). (CVE-2020-29371)

    Jann Horn discovered that the tty subsystem of the Linux kernel did not use consistent locking in some     situations, leading to a read-after-free vulnerability. A local attacker could use this to cause a denial     of service (system crash) or possibly expose sensitive information (kernel memory). (CVE-2020-29660)

    Jann Horn discovered a race condition in the tty subsystem of the Linux kernel in the locking for the     TIOCSPGRP ioctl(), 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-2020-29661)

    It was discovered that a race condition existed that caused the Linux kernel to not properly restrict exit     signal delivery. A local attacker could possibly use this to send signals to arbitrary processes.
    (CVE-2020-35508)

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 host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-4751-1 advisory.

    It was discovered that the console keyboard driver in the Linux kernel contained a race condition. A local     attacker could use this to expose sensitive information (kernel memory). (CVE-2020-25656)

    Minh Yuan discovered that the tty driver in the Linux kernel contained race conditions when handling     fonts. A local attacker could possibly use this to expose sensitive information (kernel memory).
    (CVE-2020-25668)

    Bodong Zhao discovered a use-after-free in the Sun keyboard driver implementation in the Linux kernel. A     local attacker could use this to cause a denial of service or possibly execute arbitrary code.
    (CVE-2020-25669)

    Kiyin () discovered that the perf subsystem in the Linux kernel did not properly deallocate memory     in some situations. A privileged attacker could use this to cause a denial of service (kernel memory     exhaustion). (CVE-2020-25704)

    Julien Grall discovered that the Xen dom0 event handler in the Linux kernel did not properly limit the     number of events queued. An attacker in a guest VM could use this to cause a denial of service in the host     OS. (CVE-2020-27673)

    Jinoh Kang discovered that the Xen event channel infrastructure in the Linux kernel contained a race     condition. An attacker in guest could possibly use this to cause a denial of service (dom0 crash).
    (CVE-2020-27675)

    Daniel Axtens discovered that PowerPC RTAS implementation in the Linux kernel did not properly restrict     memory accesses in some situations. A privileged local attacker could use this to arbitrarily modify     kernel memory, potentially bypassing kernel lockdown restrictions. (CVE-2020-27777)

    It was discovered that the jfs file system implementation in the Linux kernel contained an out-of-bounds     read vulnerability. A local attacker could use this to possibly cause a denial of service (system crash).
    (CVE-2020-27815)

    Shisong Qin and Bodong Zhao discovered that Speakup screen reader driver in the Linux kernel did not     correctly handle setting line discipline in some situations. A local attacker could use this to cause a     denial of service (system crash). (CVE-2020-27830, CVE-2020-28941)

    It was discovered that a use-after-free vulnerability existed in the infiniband hfi1 device driver in the     Linux kernel. A local attacker could possibly use this to cause a denial of service (system crash).
    (CVE-2020-27835)

    It was discovered that an information leak existed in the syscall implementation in the Linux kernel on 32     bit systems. A local attacker could use this to expose sensitive information (kernel memory).
    (CVE-2020-28588)

    Minh Yuan discovered that the framebuffer console driver in the Linux kernel did not properly handle fonts     in some conditions. A local attacker could use this to cause a denial of service (system crash) or     possibly expose sensitive information (kernel memory). (CVE-2020-28974)

    Michael Kurth and Pawel Wieczorkiewicz discovered that the Xen event processing backend in the Linux     kernel did not properly limit the number of events queued. An attacker in a guest VM could use this to     cause a denial of service in the host OS. (CVE-2020-29568)

    Olivier Benjamin and Pawel Wieczorkiewicz discovered a race condition the Xen paravirt block backend in     the Linux kernel, leading to a use-after-free vulnerability. An attacker in a guest VM could use this to     cause a denial of service in the host OS. (CVE-2020-29569)

    Jann Horn discovered that the tty subsystem of the Linux kernel did not use consistent locking in some     situations, leading to a read-after-free vulnerability. A local attacker could use this to cause a denial     of service (system crash) or possibly expose sensitive information (kernel memory). (CVE-2020-29660)

    Jann Horn discovered a race condition in the tty subsystem of the Linux kernel in the locking for the     TIOCSPGRP ioctl(), 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-2020-29661)

    It was discovered that a race condition existed that caused the Linux kernel to not properly restrict exit     signal delivery. A local attacker could possibly use this to send signals to arbitrary processes.
    (CVE-2020-35508)

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.

ID	Name	Product	Family	Severity
157595	AlmaLinux 8 : kernel (ALSA-2021:1578)	Nessus	Alma Linux Local Security Checks	high
151857	RHEL 8 : kernel (RHSA-2021:2718)	Nessus	Red Hat Local Security Checks	high
151856	RHEL 8 : kernel-rt (RHSA-2021:2719)	Nessus	Red Hat Local Security Checks	high
150463	OracleVM 3.4 : kernel-uek (OVMSA-2021-0016)	Nessus	OracleVM Local Security Checks	high
149914	Oracle Linux 8 : kernel (ELSA-2021-1578)	Nessus	Oracle Linux Local Security Checks	high
149874	CentOS 8 : kernel (CESA-2021:1578)	Nessus	CentOS Local Security Checks	high
149670	RHEL 8 : kernel (RHSA-2021:1578)	Nessus	Red Hat Local Security Checks	high
149660	RHEL 8 : kernel-rt (RHSA-2021:1739)	Nessus	Red Hat Local Security Checks	high
149296	Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2021-9215)	Nessus	Oracle Linux Local Security Checks	high
147982	Ubuntu 20.04 LTS : Linux kernel (OEM) vulnerabilities (USN-4752-1)	Nessus	Ubuntu Local Security Checks	high
147978	Ubuntu 20.04 LTS : Linux kernel vulnerabilities (USN-4751-1)	Nessus	Ubuntu Local Security Checks	high

Detections

Analytics

CVE-2020-35508

medium

Tenable Plugins

high

high

high

high

high

high

high

high

high

high

high