SUSE-SU-2026:21323-1: important: Security update for the Linux Kernel RT (Live Patch 6 for SUSE Linux Enterprise Micro 6.0)

[SLE-UPDATES]

# Security update for the Linux Kernel RT (Live Patch 6 for SUSE Linux
Enterprise Micro 6.0)

Announcement ID: SUSE-SU-2026:21323-1  
Release Date: 2026-04-22T16:51:39Z  
Rating: important  
References:

  * bsc#1255066
  * bsc#1259859

  
Cross-References:

  * CVE-2025-40309
  * CVE-2026-23268

  
CVSS scores:

  * CVE-2025-40309 ( SUSE ):  7.3
    CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
  * CVE-2025-40309 ( SUSE ):  7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-23268 ( SUSE ):  7.3
    CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-23268 ( SUSE ):  7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-23268 ( 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 Micro 6.0

  
  
An update that solves two vulnerabilities can now be installed.

## Description:

This update for the SUSE Linux Enterprise Kernel 6.4.0-28.1 fixes various
security issues

The following security issues were fixed:

  * CVE-2025-40309: Bluetooth: SCO: Fix UAF on sco_conn_free (bsc#1255066).
  * CVE-2026-23268: apparmor: fix unprivileged local user can do privileged
    policy management (bsc#1259859).

## 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 Micro 6.0  
    zypper in -t patch SUSE-SLE-Micro-6.0-kernel-345=1

## Package List:

  * SUSE Linux Micro 6.0 (x86_64)
    * kernel-livepatch-MICRO-6-0-RT_Update_6-debugsource-16-3.1
    * kernel-livepatch-6_4_0-28-rt-debuginfo-16-3.1
    * kernel-livepatch-6_4_0-28-rt-16-3.1

## References:

  * https://www.suse.com/security/cve/CVE-2025-40309.html
  * https://www.suse.com/security/cve/CVE-2026-23268.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1255066
  * https://bugzilla.suse.com/show_bug.cgi?id=1259859

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