SUSE alert SUSE-SU-2026:1575-1 (kernel)

From:
             
 
SLE-SECURITY-UPDATES <null@suse.de>
To:
             
 
sle-security-updates@lists.suse.com
Subject:
             
 
SUSE-SU-2026:1575-1: important: Security update for the Linux Kernel
Date:
             
 
Thu, 23 Apr 2026 20:31:52 -0000
Message-ID:
             
 
<177697631203.1901.3529214655085781936@a0a563bcf2df>


# Security update for the Linux Kernel

Announcement ID: SUSE-SU-2026:1575-1  
Release Date: 2026-04-23T15:53:10Z  
Rating: important  
References:

  * bsc#1246057
  * bsc#1257773
  * bsc#1259797
  * bsc#1260005
  * bsc#1260009
  * bsc#1260486
  * bsc#1260730

  
Cross-References:

  * CVE-2025-38234
  * CVE-2026-23103
  * CVE-2026-23243
  * CVE-2026-23272
  * CVE-2026-23274
  * CVE-2026-23293
  * CVE-2026-23398

  
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-2026-23103 ( SUSE ):  6.8
    CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-23103 ( SUSE ):  5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-23103 ( NVD ):  5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-23103 ( NVD ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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
  * CVE-2026-23272 ( SUSE ):  7.3
    CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-23272 ( SUSE ):  7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-23272 ( NVD ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-23274 ( 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-2026-23274 ( SUSE ):  7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-23274 ( NVD ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-23293 ( SUSE ):  5.9
    CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-23293 ( SUSE ):  5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-23398 ( SUSE ):  5.9
    CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-23398 ( SUSE ):  5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

  
Affected Products:

  * SUSE Linux Enterprise Micro 5.2
  * SUSE Linux Enterprise Micro for Rancher 5.2

  
  
An update that solves seven vulnerabilities can now be installed.

## Description:

The SUSE Linux Enterprise 15 SP3 RT kernel was updated to receive various
security bugfixes.

The following security bugs were fixed:

  * CVE-2025-38234: sched/rt: Fix race in push_rt_task (bsc#1246057).
  * CVE-2026-23103: ipvlan: Make the addrs_lock be per port (bsc#1257773).
  * CVE-2026-23243: RDMA/umad: Reject negative data_len in ib_umad_write
    (bsc#1259797).
  * CVE-2026-23272: netfilter: nf_tables: unconditionally bump set->nelems
    before insertion (bsc#1260009).
  * CVE-2026-23274: netfilter: xt_IDLETIMER: reject rev0 reuse of ALARM timer
    labels (bsc#1260005).
  * CVE-2026-23293: net: vxlan: fix nd_tbl NULL dereference when IPv6 is
    disabled (bsc#1260486).
  * CVE-2026-23398: icmp: fix NULL pointer dereference in icmp_tag_validation()
    (bsc#1260730).

## 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 Micro 5.2  
    zypper in -t patch SUSE-SUSE-MicroOS-5.2-2026-1575=1

  * SUSE Linux Enterprise Micro for Rancher 5.2  
    zypper in -t patch SUSE-SUSE-MicroOS-5.2-2026-1575=1

## Package List:

  * SUSE Linux Enterprise Micro 5.2 (nosrc x86_64)
    * kernel-rt-5.3.18-150300.241.1
  * SUSE Linux Enterprise Micro 5.2 (x86_64)
    * kernel-rt-debuginfo-5.3.18-150300.241.1
    * kernel-rt-debugsource-5.3.18-150300.241.1
  * SUSE Linux Enterprise Micro 5.2 (noarch)
    * kernel-source-rt-5.3.18-150300.241.1
  * SUSE Linux Enterprise Micro for Rancher 5.2 (nosrc x86_64)
    * kernel-rt-5.3.18-150300.241.1
  * SUSE Linux Enterprise Micro for Rancher 5.2 (x86_64)
    * kernel-rt-debuginfo-5.3.18-150300.241.1
    * kernel-rt-debugsource-5.3.18-150300.241.1
  * SUSE Linux Enterprise Micro for Rancher 5.2 (noarch)
    * kernel-source-rt-5.3.18-150300.241.1

## References:

  * https://www.suse.com/security/cve/CVE-2025-38234.html
  * https://www.suse.com/security/cve/CVE-2026-23103.html
  * https://www.suse.com/security/cve/CVE-2026-23243.html
  * https://www.suse.com/security/cve/CVE-2026-23272.html
  * https://www.suse.com/security/cve/CVE-2026-23274.html
  * https://www.suse.com/security/cve/CVE-2026-23293.html
  * https://www.suse.com/security/cve/CVE-2026-23398.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1246057
  * https://bugzilla.suse.com/show_bug.cgi?id=1257773
  * https://bugzilla.suse.com/show_bug.cgi?id=1259797
  * https://bugzilla.suse.com/show_bug.cgi?id=1260005
  * https://bugzilla.suse.com/show_bug.cgi?id=1260009
  * https://bugzilla.suse.com/show_bug.cgi?id=1260486
  * https://bugzilla.suse.com/show_bug.cgi?id=1260730



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