Security update for the Linux Kernel (Live Patch 41 for SLE 12 SP3)

Announcement ID: SUSE-SU-2021:4052-1
Rating: important
References:
Cross-References:
CVSS scores:
  • CVE-2021-0935 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  • CVE-2021-0935 ( NVD ): 6.7 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
  • CVE-2021-28688 ( SUSE ): 6.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
  • CVE-2021-28688 ( NVD ): 6.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Affected Products:
  • SUSE Linux Enterprise High Performance Computing 12 SP3
  • SUSE Linux Enterprise Server 12 SP3
  • SUSE Linux Enterprise Server 12 SP3 ESPOS 12-SP3
  • SUSE Linux Enterprise Server 12 SP3 LTSS 12-SP3
  • SUSE Linux Enterprise Server for SAP Applications 12 SP3

An update that solves two vulnerabilities can now be installed.

Description:

This update for the Linux Kernel 4.4.180-94_150 fixes several issues.

The following security issues were fixed:

  • CVE-2021-0935: In ip6_xmit of ip6_output.c, there is a possible out of bounds write due to a use after free. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation. (bsc#1192032)
  • CVE-2021-28688: 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. (bsc#1183646)

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 for SAP Applications 12 SP3
    zypper in -t patch SUSE-SLE-SAP-12-SP3-2021-4052=1
  • SUSE Linux Enterprise Server 12 SP3 ESPOS 12-SP3
    zypper in -t patch SUSE-SLE-SERVER-12-SP3-ESPOS-2021-4052=1
  • SUSE Linux Enterprise Server 12 SP3 LTSS 12-SP3
    zypper in -t patch SUSE-SLE-SERVER-12-SP3-2021-4052=1

Package List:

  • SUSE Linux Enterprise Server for SAP Applications 12 SP3 (ppc64le x86_64)
    • kgraft-patch-4_4_180-94_150-default-2-2.1
    • kgraft-patch-4_4_180-94_150-default-debuginfo-2-2.1
  • SUSE Linux Enterprise Server 12 SP3 ESPOS 12-SP3 (x86_64)
    • kgraft-patch-4_4_180-94_150-default-2-2.1
    • kgraft-patch-4_4_180-94_150-default-debuginfo-2-2.1
  • SUSE Linux Enterprise Server 12 SP3 LTSS 12-SP3 (ppc64le x86_64)
    • kgraft-patch-4_4_180-94_150-default-2-2.1
    • kgraft-patch-4_4_180-94_150-default-debuginfo-2-2.1

References: