SUSE-SU-2026:1777-1: important: Security update for the Linux Kernel

[SLE-SECURITY-UPDATES]

# Security update for the Linux Kernel

Announcement ID: SUSE-SU-2026:1777-1  
Release Date: 2026-05-08T13:10:13Z  
Rating: important  
References:

  * bsc#1246057
  * bsc#1259797

  
Cross-References:

  * CVE-2025-38234
  * CVE-2026-23243

  
CVSS scores:

  * CVE-2025-38234 ( SUSE ):  5.7
    CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
  * CVE-2025-38234 ( SUSE ):  4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
  * CVE-2025-38234 ( NVD ):  4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-23243 ( 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-2026-23243 ( SUSE ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-23243 ( 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 11 SP4
  * SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE

  
  
An update that solves two vulnerabilities can now be installed.

## Description:

The SUSE Linux Enterprise 11 SP4 kernel was updated to fix various security
issues

The following security issues were fixed:

  * CVE-2025-38234: sched/rt: Fix race in push_rt_task (bsc#1246057).
  * CVE-2026-23243: RDMA/umad: Reject negative data_len in ib_umad_write
    (bsc#1259797).

## 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 11 SP4 LTSS EXTREME CORE  
    zypper in -t patch SUSE-SLE-SERVER-11-SP4-LTSS-EXTREME-CORE-2026-1777=1

  * SUSE Linux Enterprise Server 11 SP4  
    zypper in -t patch SUSE-SLE-SERVER-11-SP4-LTSS-EXTREME-CORE-2026-1777=1

## Package List:

  * SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE (nosrc x86_64)
    * kernel-trace-3.0.101-108.207.1
    * kernel-xen-3.0.101-108.207.1
    * kernel-default-3.0.101-108.207.1
    * kernel-ec2-3.0.101-108.207.1
  * SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE (x86_64)
    * kernel-ec2-debugsource-3.0.101-108.207.1
    * kernel-ec2-devel-3.0.101-108.207.1
    * kernel-default-debugsource-3.0.101-108.207.1
    * kernel-trace-devel-debuginfo-3.0.101-108.207.1
    * kernel-xen-debuginfo-3.0.101-108.207.1
    * kernel-default-debuginfo-3.0.101-108.207.1
    * kernel-trace-debugsource-3.0.101-108.207.1
    * kernel-trace-base-3.0.101-108.207.1
    * kernel-xen-devel-debuginfo-3.0.101-108.207.1
    * kernel-syms-3.0.101-108.207.1
    * kernel-default-base-3.0.101-108.207.1
    * kernel-default-devel-debuginfo-3.0.101-108.207.1
    * kernel-xen-devel-3.0.101-108.207.1
    * kernel-trace-devel-3.0.101-108.207.1
    * kernel-source-3.0.101-108.207.1
    * kernel-xen-debugsource-3.0.101-108.207.1
    * kernel-ec2-base-3.0.101-108.207.1
    * kernel-trace-debuginfo-3.0.101-108.207.1
    * kernel-default-devel-3.0.101-108.207.1
    * kernel-ec2-debuginfo-3.0.101-108.207.1
    * kernel-ec2-devel-debuginfo-3.0.101-108.207.1
    * kernel-xen-base-3.0.101-108.207.1
  * SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE (noarch nosrc)
    * kernel-docs-3.0.101-108.207.1
  * SUSE Linux Enterprise Server 11 SP4 (nosrc x86_64)
    * kernel-trace-3.0.101-108.207.1
    * kernel-xen-3.0.101-108.207.1
    * kernel-default-3.0.101-108.207.1
    * kernel-ec2-3.0.101-108.207.1
  * SUSE Linux Enterprise Server 11 SP4 (x86_64)
    * kernel-ec2-debugsource-3.0.101-108.207.1
    * kernel-ec2-devel-3.0.101-108.207.1
    * kernel-default-debugsource-3.0.101-108.207.1
    * kernel-trace-devel-debuginfo-3.0.101-108.207.1
    * kernel-xen-debuginfo-3.0.101-108.207.1
    * kernel-default-debuginfo-3.0.101-108.207.1
    * kernel-trace-debugsource-3.0.101-108.207.1
    * kernel-trace-base-3.0.101-108.207.1
    * kernel-xen-devel-debuginfo-3.0.101-108.207.1
    * kernel-syms-3.0.101-108.207.1
    * kernel-default-base-3.0.101-108.207.1
    * kernel-default-devel-debuginfo-3.0.101-108.207.1
    * kernel-xen-devel-3.0.101-108.207.1
    * kernel-trace-devel-3.0.101-108.207.1
    * kernel-source-3.0.101-108.207.1
    * kernel-xen-debugsource-3.0.101-108.207.1
    * kernel-ec2-base-3.0.101-108.207.1
    * kernel-trace-debuginfo-3.0.101-108.207.1
    * kernel-default-devel-3.0.101-108.207.1
    * kernel-ec2-debuginfo-3.0.101-108.207.1
    * kernel-ec2-devel-debuginfo-3.0.101-108.207.1
    * kernel-xen-base-3.0.101-108.207.1
  * SUSE Linux Enterprise Server 11 SP4 (noarch nosrc)
    * kernel-docs-3.0.101-108.207.1

## References:

  * https://www.suse.com/security/cve/CVE-2025-38234.html
  * https://www.suse.com/security/cve/CVE-2026-23243.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1246057
  * https://bugzilla.suse.com/show_bug.cgi?id=1259797

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