SUSE-SU-2021:0840-1: important: Security update for the Linux Kernel (Live Patch 9 for SLE 15 SP2)

[sle-security-updates at lists.suse.com]

   SUSE Security Update: Security update for the Linux Kernel (Live Patch 9 for SLE 15 SP2)
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Announcement ID:    SUSE-SU-2021:0840-1
Rating:             important
References:         #1179664 #1181553 
Cross-References:   CVE-2020-29368 CVE-2021-3347
CVSS scores:
                    CVE-2020-29368 (NVD) : 7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
                    CVE-2020-29368 (SUSE): 7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
                    CVE-2021-3347 (NVD) : 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
                    CVE-2021-3347 (SUSE): 8.4 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Products:
                    SUSE Linux Enterprise Module for Live Patching 15-SP2
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   An update that fixes two vulnerabilities is now available.

Description:

   This update for the Linux Kernel 5.3.18-24_46 fixes several issues.

   The following security issues were fixed:

   - CVE-2020-29368: Fixed an issue in copy-on-write implementation which
     could have granted unintended write access because of a race condition
     in a THP mapcount check (bsc#1179664).
   - CVE-2021-3347: Fixed a use-after-free in the PI futexes during fault
     handling, allowing local users to execute code in the kernel
     (bsc#1181553).


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 Module for Live Patching 15-SP2:

      zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP2-2021-840=1



Package List:

   - SUSE Linux Enterprise Module for Live Patching 15-SP2 (ppc64le s390x x86_64):

      kernel-livepatch-5_3_18-24_46-default-3-2.2
      kernel-livepatch-5_3_18-24_46-default-debuginfo-3-2.2
      kernel-livepatch-SLE15-SP2_Update_9-debugsource-3-2.2


References:

   https://www.suse.com/security/cve/CVE-2020-29368.html
   https://www.suse.com/security/cve/CVE-2021-3347.html
   https://bugzilla.suse.com/1179664
   https://bugzilla.suse.com/1181553