# Security update for the Linux Kernel (Live Patch 35 for SLE 15 SP3)

Announcement ID: SUSE-SU-2023:4820-1  
Rating: important  
References:

  * bsc#1215097
  * bsc#1215442
  * bsc#1215519

  
Cross-References:

  * CVE-2023-2163
  * CVE-2023-3777
  * CVE-2023-4622

  
CVSS scores:

  * CVE-2023-2163 ( SUSE ):  7.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
  * CVE-2023-2163 ( NVD ):  10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
  * CVE-2023-3777 ( SUSE ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2023-3777 ( NVD ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2023-4622 ( SUSE ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2023-4622 ( NVD ):  7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

  
Affected Products:

  * openSUSE Leap 15.3
  * SUSE Linux Enterprise High Performance Computing 15 SP3
  * SUSE Linux Enterprise Live Patching 15-SP3
  * SUSE Linux Enterprise Micro 5.1
  * SUSE Linux Enterprise Micro 5.2
  * SUSE Linux Enterprise Server 15 SP3
  * SUSE Linux Enterprise Server for SAP Applications 15 SP3

  
  
An update that solves three vulnerabilities can now be installed.

## Description:

This update for the Linux Kernel 5.3.18-150300_59_130 fixes several issues.

The following security issues were fixed:

  * CVE-2023-3777: Fixed a use-after-free vulnerability in netfilter: nf_tables
    component can be exploited to achieve local privilege escalation.
    (bsc#1215097)
  * CVE-2023-4622: Fixed a use-after-free vulnerability in the Unix domain
    sockets component which could be exploited to achieve local privilege
    escalation (bsc#1215442).
  * CVE-2023-2163: Fixed an incorrect verifier pruning in BPF that could lead to
    unsafe code paths being incorrectly marked as safe, resulting in arbitrary
    read/write in kernel memory, lateral privilege escalation, and container
    escape. (bsc#1215519)

## 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:

  * openSUSE Leap 15.3  
    zypper in -t patch SUSE-2023-4820=1 SUSE-2023-4821=1

  * SUSE Linux Enterprise Live Patching 15-SP3  
    zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP3-2023-4820=1 SUSE-SLE-
Module-Live-Patching-15-SP3-2023-4821=1

## Package List:

  * openSUSE Leap 15.3 (ppc64le s390x x86_64)
    * kernel-livepatch-SLE15-SP3_Update_34-debugsource-5-150300.2.1
    * kernel-livepatch-5_3_18-150300_59_130-default-4-150300.2.1
    * kernel-livepatch-SLE15-SP3_Update_35-debugsource-4-150300.2.1
    * kernel-livepatch-5_3_18-150300_59_130-default-debuginfo-4-150300.2.1
    * kernel-livepatch-5_3_18-150300_59_127-default-5-150300.2.1
    * kernel-livepatch-5_3_18-150300_59_127-default-debuginfo-5-150300.2.1
  * openSUSE Leap 15.3 (x86_64)
    * kernel-livepatch-5_3_18-150300_59_127-preempt-5-150300.2.1
    * kernel-livepatch-5_3_18-150300_59_127-preempt-debuginfo-5-150300.2.1
    * kernel-livepatch-5_3_18-150300_59_130-preempt-4-150300.2.1
    * kernel-livepatch-5_3_18-150300_59_130-preempt-debuginfo-4-150300.2.1
  * SUSE Linux Enterprise Live Patching 15-SP3 (ppc64le s390x x86_64)
    * kernel-livepatch-5_3_18-150300_59_127-default-5-150300.2.1
    * kernel-livepatch-5_3_18-150300_59_130-default-4-150300.2.1

## References:

  * https://www.suse.com/security/cve/CVE-2023-2163.html
  * https://www.suse.com/security/cve/CVE-2023-3777.html
  * https://www.suse.com/security/cve/CVE-2023-4622.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1215097
  * https://bugzilla.suse.com/show_bug.cgi?id=1215442
  * https://bugzilla.suse.com/show_bug.cgi?id=1215519