SUSE-SU-2026:21616-1: important: Security update for the Linux Kernel

[SLE-UPDATES]

# Security update for the Linux Kernel

Announcement ID: SUSE-SU-2026:21616-1  
Release Date: 2026-05-12T14:11:03Z  
Rating: important  
References:

  * bsc#1264449
  * bsc#1264450

  
Cross-References:

  * CVE-2026-43284
  * CVE-2026-43500

  
CVSS scores:

  * CVE-2026-43284 ( SUSE ):  8.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
  * CVE-2026-43284 ( NVD ):  7.8 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
  * CVE-2026-43284 ( NVD ):  8.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
  * CVE-2026-43500 ( SUSE ):  8.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
  * CVE-2026-43500 ( NVD ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-43500 ( NVD ):  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 Server High Availability Extension 16.0

  
  
An update that solves two vulnerabilities can now be installed.

## Description:

The SUSE Linux Enterprise 16.0 kernel was updated to fix various security issues

The following security issues were fixed:

Dirty Frag fixes:

  * CVE-2026-43500: supported.conf: drop rxrpc completely (bsc#1264450)
  * CVE-2026-43284: xfrm: esp: avoid in-place decrypt on shared skb frags
    (bsc#1264449).

## Special Instructions and Notes:

  * Please reboot the system after installing this update.

## 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:

  * SUSE Linux Enterprise Server High Availability Extension 16.0  
    zypper in -t patch SUSE-SLES-HA-16.0-734=1

## Package List:

  * SUSE Linux Enterprise Server High Availability Extension 16.0 (ppc64le s390x
    x86_64)
    * dlm-kmp-default-debuginfo-6.12.0-160000.30.1
    * kernel-default-debuginfo-6.12.0-160000.30.1
    * cluster-md-kmp-default-6.12.0-160000.30.1
    * gfs2-kmp-default-debuginfo-6.12.0-160000.30.1
    * gfs2-kmp-default-6.12.0-160000.30.1
    * kernel-default-debugsource-6.12.0-160000.30.1
    * cluster-md-kmp-default-debuginfo-6.12.0-160000.30.1
    * dlm-kmp-default-6.12.0-160000.30.1
  * SUSE Linux Enterprise Server High Availability Extension 16.0 (nosrc)
    * kernel-default-6.12.0-160000.30.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-43284.html
  * https://www.suse.com/security/cve/CVE-2026-43500.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1264449
  * https://bugzilla.suse.com/show_bug.cgi?id=1264450

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