SUSE Security Update: Security update for the Linux Kernel
______________________________________________________________________________

Announcement ID:    SUSE-SU-2022:0756-1
Rating:             important
References:         #1146312 #1190717 #1191580 #1193731 #1194463 
                    #1195543 #1195612 #1195908 #1195939 #1196079 
                    #1196612 
Cross-References:   CVE-2016-10905 CVE-2021-0920 CVE-2022-0001
                    CVE-2022-0002 CVE-2022-0492 CVE-2022-0617
                    CVE-2022-24448
CVSS scores:
                    CVE-2016-10905 (NVD) : 7.8 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
                    CVE-2016-10905 (SUSE): 5.3 CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:H
                    CVE-2021-0920 (NVD) : 6.4 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
                    CVE-2021-0920 (SUSE): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
                    CVE-2022-0001 (SUSE): 5.6 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
                    CVE-2022-0002 (SUSE): 5.6 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
                    CVE-2022-0492 (SUSE): 7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
                    CVE-2022-0617 (NVD) : 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
                    CVE-2022-0617 (SUSE): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
                    CVE-2022-24448 (NVD) : 3.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
                    CVE-2022-24448 (SUSE): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected Products:
                    SUSE Linux Enterprise Server 12-SP2-BCL
______________________________________________________________________________

   An update that solves 7 vulnerabilities and has four fixes
   is now available.

Description:

   The SUSE Linux Enterprise 12 SP2 kernel was updated to receive various
   security and bugfixes.


   Transient execution side-channel attacks attacking the Branch History
   Buffer (BHB), named "Branch Target Injection" and "Intra-Mode Branch
   History Injection" are now mitigated.

   The following security bugs were fixed:

   - CVE-2022-0001: Fixed Branch History Injection vulnerability
     (bsc#1191580).
   - CVE-2022-0002: Fixed Intra-Mode Branch Target Injection vulnerability
     (bsc#1191580).
   - CVE-2022-0617: Fixed a null pointer dereference in UDF file system
     functionality. A local user could crash the system by triggering
     udf_file_write_iter() via a malicious UDF image. (bsc#1196079)
   - CVE-2022-0492: Fixed a privilege escalation related to cgroups v1
     release_agent feature, which allowed bypassing namespace isolation
     unexpectedly (bsc#1195543).
   - CVE-2022-24448: Fixed an issue in fs/nfs/dir.c. If an application sets
     the O_DIRECTORY flag, and tries to open a regular file,
     nfs_atomic_open() performs a regular lookup. If a regular file is found,
     ENOTDIR should have occured, but the server instead returned
     uninitialized data in the file descriptor (bsc#1195612).
   - CVE-2021-0920: Fixed a local privilege escalation due to a
     use-after-free bug in unix_gc (bsc#1193731).
   - CVE-2016-10905: Fixed a use-after-free is gfs2_clear_rgrpd() and
     read_rindex_entry() (bsc#1146312).

   The following non-security bug was fixed:

   - net: sched: sch_teql: fix null-pointer dereference (bsc#1190717).


Special Instructions and Notes:

   Please reboot the system after installing this update.

Patch Instructions:

   To install this SUSE Security 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:

      zypper in -t patch SUSE-SLE-SERVER-12-SP2-BCL-2022-756=1



Package List:

   - SUSE Linux Enterprise Server 12-SP2-BCL (noarch):

      kernel-devel-4.4.121-92.169.1
      kernel-macros-4.4.121-92.169.1
      kernel-source-4.4.121-92.169.1

   - SUSE Linux Enterprise Server 12-SP2-BCL (x86_64):

      kernel-default-4.4.121-92.169.1
      kernel-default-base-4.4.121-92.169.1
      kernel-default-base-debuginfo-4.4.121-92.169.1
      kernel-default-debuginfo-4.4.121-92.169.1
      kernel-default-debugsource-4.4.121-92.169.1
      kernel-default-devel-4.4.121-92.169.1
      kernel-syms-4.4.121-92.169.1


References:

   https://www.suse.com/security/cve/CVE-2016-10905.html
   https://www.suse.com/security/cve/CVE-2021-0920.html
   https://www.suse.com/security/cve/CVE-2022-0001.html
   https://www.suse.com/security/cve/CVE-2022-0002.html
   https://www.suse.com/security/cve/CVE-2022-0492.html
   https://www.suse.com/security/cve/CVE-2022-0617.html
   https://www.suse.com/security/cve/CVE-2022-24448.html
   https://bugzilla.suse.com/1146312
   https://bugzilla.suse.com/1190717
   https://bugzilla.suse.com/1191580
   https://bugzilla.suse.com/1193731
   https://bugzilla.suse.com/1194463
   https://bugzilla.suse.com/1195543
   https://bugzilla.suse.com/1195612
   https://bugzilla.suse.com/1195908
   https://bugzilla.suse.com/1195939
   https://bugzilla.suse.com/1196079
   https://bugzilla.suse.com/1196612