Security update for the Linux Kernel

Announcement ID: SUSE-SU-2022:2721-1
Rating: important
References:
Cross-References:
CVSS scores:
  • CVE-2020-15393 ( SUSE ): 4.4 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
  • CVE-2020-15393 ( NVD ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  • CVE-2020-36557 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  • CVE-2020-36557 ( NVD ): 5.1 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
  • CVE-2020-36558 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  • CVE-2020-36558 ( NVD ): 5.1 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
  • CVE-2021-33655 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  • CVE-2021-33655 ( NVD ): 6.7 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
  • CVE-2021-33656 ( SUSE ): 6.3 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:H
  • CVE-2021-33656 ( NVD ): 6.8 CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
  • CVE-2021-39713 ( SUSE ): 7.4 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
  • CVE-2021-39713 ( NVD ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
  • CVE-2022-1462 ( SUSE ): 6.3 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H
  • CVE-2022-1462 ( NVD ): 6.3 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H
  • CVE-2022-20166 ( SUSE ): 6.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
  • CVE-2022-20166 ( NVD ): 6.7 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
  • CVE-2022-2318 ( SUSE ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  • CVE-2022-2318 ( NVD ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  • CVE-2022-26365 ( SUSE ): 6.6 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
  • CVE-2022-26365 ( NVD ): 7.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
  • CVE-2022-33740 ( SUSE ): 6.6 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
  • CVE-2022-33740 ( NVD ): 7.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
  • CVE-2022-33741 ( SUSE ): 6.6 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
  • CVE-2022-33741 ( NVD ): 7.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
  • CVE-2022-33742 ( SUSE ): 6.6 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
  • CVE-2022-33742 ( NVD ): 7.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
  • CVE-2022-36946 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • CVE-2022-36946 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Products:
  • SUSE Linux Enterprise High Performance Computing 12 SP2
  • SUSE Linux Enterprise Server 12 SP2
  • SUSE Linux Enterprise Server 12 SP2 BCL 12-SP2

An update that solves 14 vulnerabilities can now be installed.

Description:

The SUSE Linux Enterprise 12 kernel was updated to receive various security bugfixes.

The following security bugs were fixed:

  • CVE-2022-36946: Fixed an incorrect packet trucation operation which could lead to denial of service (bnc#1201940).
  • CVE-2022-20166: Fixed several possible memory safety issues due to unsafe operations (bsc#1200598).
  • CVE-2020-15393: Fixed a memory leak in the usbtest driver which could lead to denial of service (bnc#1173514).
  • CVE-2020-36558: Fixed a race condition involving VT_RESIZEX which could lead to a NULL pointer dereference and general protection fault (bnc#1200910).
  • CVE-2020-36557: Fixed a race condition between the VT_DISALLOCATE ioctl and closing/opening of TTYs could lead to a use-after-free (bnc#1201429).
  • CVE-2021-33656: Fixed memory out of bounds write related to ioctl cmd PIO_FONT (bnc#1201636).
  • CVE-2021-33655: Fixed out of bounds write with ioctl FBIOPUT_VSCREENINFO (bnc#1201635).
  • CVE-2022-1462: Fixed an out-of-bounds read flaw in the TTY subsystem (bnc#1198829).
  • CVE-2022-26365, CVE-2022-33740, CVE-2022-33741, CVE-2022-33742: Fixed multiple potential data leaks with Block and Network devices when using untrusted backends (bsc#1200762).
  • CVE-2022-2318: Fixed a use-after-free vulnerability in the timer handler in Rose subsystem that allowed unprivileged attackers to crash the system (bsc#1201251).
  • CVE-2021-39713: Fixed a race condition in the network scheduling subsystem which could lead to a use-after-free (bnc#1196973).

The following non-security bugs were fixed:

  • kvm: emulate: Do not adjust size of fastop and setcc subroutines (bsc#1201930).
  • kvm: emulate: Fix SETcc emulation function offsets with SLS (bsc#1201930).

Special Instructions and Notes:

  • Please reboot the system after installing this update.

Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Alternatively you can run the command listed for your product:

  • SUSE Linux Enterprise Server 12 SP2 BCL 12-SP2
    zypper in -t patch SUSE-SLE-SERVER-12-SP2-BCL-2022-2721=1

Package List:

  • SUSE Linux Enterprise Server 12 SP2 BCL 12-SP2 (nosrc x86_64)
    • kernel-default-4.4.121-92.181.1
  • SUSE Linux Enterprise Server 12 SP2 BCL 12-SP2 (x86_64)
    • kernel-default-base-4.4.121-92.181.1
    • kernel-default-debugsource-4.4.121-92.181.1
    • kernel-syms-4.4.121-92.181.1
    • kernel-default-devel-4.4.121-92.181.1
    • kernel-default-base-debuginfo-4.4.121-92.181.1
    • kernel-default-debuginfo-4.4.121-92.181.1
  • SUSE Linux Enterprise Server 12 SP2 BCL 12-SP2 (noarch)
    • kernel-source-4.4.121-92.181.1
    • kernel-devel-4.4.121-92.181.1
    • kernel-macros-4.4.121-92.181.1

References: