SUSE Security Update: Security update for the Linux Kernel (Live Patch 23 for SLE 15)
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Announcement ID:    SUSE-SU-2021:3401-1
Rating:             important
References:         #1187054 #1188613 #1190118 #1190350 
Cross-References:   CVE-2021-3573 CVE-2021-3640 CVE-2021-3715
                    CVE-2021-38160
CVSS scores:
                    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-2021-3715 (SUSE): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/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
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   An update that fixes four vulnerabilities is now available.

Description:

   This update for the Linux Kernel 4.12.14-150_69 fixes several issues.

   The following security issues were fixed:

   - CVE-2021-3715: Fixed a user-after-free in the Linux kernel's Traffic
     Control networking subsystem which could lead to local privilege
     escalation. (bsc#1190350).
   - 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:

      zypper in -t patch SUSE-SLE-Module-Live-Patching-15-2021-3401=1



Package List:

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

      kernel-livepatch-4_12_14-150_69-default-10-2.2
      kernel-livepatch-4_12_14-150_69-default-debuginfo-10-2.2


References:

   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-2021-3715.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/1190350