SUSE Security Update: Security update for the Linux Kernel (Live Patch 0 for
 SLE 15 SP3)
______________________________________________________________________________

Announcement ID:    SUSE-SU-2021:3360-1
Rating:             important
References:         #1187054 #1188613 #1190118 #1190127 
Cross-References:   CVE-2021-31440 CVE-2021-3573 CVE-2021-3640
                    CVE-2021-38160
CVSS scores:
                    CVE-2021-31440 (NVD) : 7
 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
                    CVE-2021-31440 (SUSE): 7
 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
                    CVE-2021-3573 (SUSE): 8.4
 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
                    CVE-2021-3640 (SUSE): 7.4
 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
                    CVE-2021-38160 (SUSE): 7
 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Products:
                    SUSE Linux Enterprise Module for Live Patching 15-SP3
______________________________________________________________________________

   An update that fixes four vulnerabilities is now available.

Description:

   This update for the Linux Kernel 5.3.18-57 fixes several issues.

   The following security issues were fixed:

   - CVE-2021-31440: Fixed a lack of proper validation of user-supplied eBPF
     programs prior to executing them. An attacker can leverage this
     vulnerability to escalate privileges and execute arbitrary code in the
     context of the kernel. (bsc#1190127).
   - CVE-2021-38160: Fixed a bug that could lead to a data corruption or
     loss. This can be triggered by an untrusted device that supplies a
     buf->len value exceeding the buffer size in
     drivers/char/virtio_console.c (bsc#1190118)
   - CVE-2021-3640: Fixed a user-after-free bug in the function
     sco_sock_sendmsg which could lead to local privilege escalation.
     (bsc#1188613)
   - CVE-2021-3573: Fixed a user-after-free bug in the function
     hci_sock_bound_ioctl which could lead to local privilege escalation.
     (bsc#1187054).


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-SP3:

      zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP3-2021-3360=1



Package List:

   - SUSE Linux Enterprise Module for Live Patching 15-SP3 (ppc64le s390x
 x86_64):

      kernel-livepatch-5_3_18-57-default-7-3.1
      kernel-livepatch-5_3_18-57-default-debuginfo-7-3.1
      kernel-livepatch-SLE15-SP3_Update_0-debugsource-7-3.1


References:

   https://www.suse.com/security/cve/CVE-2021-31440.html
   https://www.suse.com/security/cve/CVE-2021-3573.html
   https://www.suse.com/security/cve/CVE-2021-3640.html
   https://www.suse.com/security/cve/CVE-2021-38160.html
   https://bugzilla.suse.com/1187054
   https://bugzilla.suse.com/1188613
   https://bugzilla.suse.com/1190118
   https://bugzilla.suse.com/1190127