Security update for the Linux Kernel (Live Patch 16 for SLE 12 SP4)

SUSE Security Update: Security update for the Linux Kernel (Live Patch 16 for SLE 12 SP4)
Announcement ID: SUSE-SU-2021:0823-1
Rating: important
References: #1178684 #1179616 #1179664 #1181553 #1182108 #1182468
Cross-References:CVE-2020-27786 CVE-2020-28374 CVE-2020-29368 CVE-2021-3347
Affected Products:
  • SUSE Linux Enterprise Live Patching 12-SP4

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

Description:

This update for the Linux Kernel 4.12.14-95_60 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).
  • Fixed an issue where NFS client filesystems got unmounted on fail-over (bsc#1182468).
  • Fixed an issue where NFS client hanged on write errors (bsc#1182108).
  • 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).
  • CVE-2020-27786: Fixed a potential user after free which could have led to memory corruption or privilege escalation (bsc#1179616).
  • CVE-2020-28374: Fixed insufficient identifier checking in the LIO SCSI target code which could have been used by remote attackers to read or write files via directory traversal in an XCOPY request (bsc#1178684).

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 Live Patching 12-SP4:
    zypper in -t patch SUSE-SLE-Live-Patching-12-SP4-2021-823=1 SUSE-SLE-Live-Patching-12-SP4-2021-824=1 SUSE-SLE-Live-Patching-12-SP4-2021-825=1

Package List:

  • SUSE Linux Enterprise Live Patching 12-SP4 (ppc64le s390x x86_64):
    • kgraft-patch-4_12_14-95_54-default-7-2.2
    • kgraft-patch-4_12_14-95_57-default-7-2.2
    • kgraft-patch-4_12_14-95_60-default-6-2.2

References: