SUSE Security Update: Security update for the Linux Kernel (Live Patch 9 for
 SLE 15 SP2)
______________________________________________________________________________

Announcement ID:    SUSE-SU-2021:0359-1
Rating:             important
References:         #1179664 #1179779 #1180008 
Cross-References:   CVE-2020-29368 CVE-2020-29373 CVE-2020-29569
                   
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-2020-29373 (SUSE): 7.7
 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
                    CVE-2020-29569 (NVD) : 8.8
 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
                    CVE-2020-29569 (SUSE): 8.8
 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/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 three 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-2020-29373: Fixed an issue where kernel unsafely handles the root
     directory during path lookups, and thus a process inside a mount
     namespace can escape to unintended filesystem locations (bsc#1179779).
   - CVE-2020-29569: Fixed a use after free due to a logic error
     (bsc#1180008).
   - CVE-2020-29368: Fixed an issue in copy-on-write implementation which
     could grant unintended write access because of a race condition in a THP
     mapcount check (bsc#1179664).


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-SP2-2021-359=1



Package List:

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

      kernel-livepatch-5_3_18-24_46-default-2-2.1
      kernel-livepatch-5_3_18-24_46-default-debuginfo-2-2.1
      kernel-livepatch-SLE15-SP2_Update_9-debugsource-2-2.1


References:

   https://www.suse.com/security/cve/CVE-2020-29368.html
   https://www.suse.com/security/cve/CVE-2020-29373.html
   https://www.suse.com/security/cve/CVE-2020-29569.html
   https://bugzilla.suse.com/1179664
   https://bugzilla.suse.com/1179779
   https://bugzilla.suse.com/1180008