SUSE-SU-2021:2584-1: important: Security update for the Linux Kernel (Live Patch 19 for SLE 15 SP1)

[sle-updates at lists.suse.com]

   SUSE Security Update: Security update for the Linux Kernel (Live Patch 19 for SLE 15 SP1)
______________________________________________________________________________

Announcement ID:    SUSE-SU-2021:2584-1
Rating:             important
References:         #1187052 #1188117 #1188257 
Cross-References:   CVE-2020-36385 CVE-2021-22555 CVE-2021-33909
                   
CVSS scores:
                    CVE-2020-36385 (NVD) : 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
                    CVE-2020-36385 (SUSE): 8.4 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
                    CVE-2021-22555 (NVD) : 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
                    CVE-2021-22555 (SUSE): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
                    CVE-2021-33909 (NVD) : 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
                    CVE-2021-33909 (SUSE): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Products:
                    SUSE Linux Enterprise Module for Live Patching 15-SP1
                    SUSE Linux Enterprise Live Patching 12-SP4
______________________________________________________________________________

   An update that fixes three vulnerabilities is now available.

Description:

   This update for the Linux Kernel 4.12.14-197_72 fixes several issues.

   The following security issues were fixed:

   - CVE-2021-33909: Fixed an out-of-bounds write in the filesystem layer
     that allows to andobtain full root privileges. (bsc#1188062)
   - CVE-2021-22555: Fixed an heap out-of-bounds write in
     net/netfilter/x_tables.c that could allow local provilege escalation.
     (bsc#1188116)
   - CVE-2020-36385: Fixed a use-after-free vulnerability reached via the
     ctx_list in some ucma_migrate_id situations where ucma_close is called.
     (bnc#1187050)


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-SP1:

      zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP1-2021-2585=1

   - SUSE Linux Enterprise Live Patching 12-SP4:

      zypper in -t patch SUSE-SLE-Live-Patching-12-SP4-2021-2584=1



Package List:

   - SUSE Linux Enterprise Module for Live Patching 15-SP1 (ppc64le x86_64):

      kernel-livepatch-4_12_14-197_72-default-9-2.2

   - SUSE Linux Enterprise Live Patching 12-SP4 (ppc64le s390x x86_64):

      kgraft-patch-4_12_14-95_68-default-8-2.2


References:

   https://www.suse.com/security/cve/CVE-2020-36385.html
   https://www.suse.com/security/cve/CVE-2021-22555.html
   https://www.suse.com/security/cve/CVE-2021-33909.html
   https://bugzilla.suse.com/1187052
   https://bugzilla.suse.com/1188117
   https://bugzilla.suse.com/1188257