SUSE-SU-2026:3734-1: important: Security update for the Linux Kernel (Live Patch 56 for SUSE Linux Enterprise 15 SP4)

OPENSUSE-SECURITY-UPDATES <[email protected]>
Newsgroups gmane.linux.suse.security.announce
Message-ID <178759283205.283.14506129286376978293@fafdf49fb59f> 
# Security update for the Linux Kernel (Live Patch 56 for SUSE Linux Enterprise
15 SP4)

Announcement ID: SUSE-SU-2026:3734-1  
Release Date: 2026-08-24T10:35:31Z  
Rating: important  
References:

  * bsc#1267625
  * bsc#1268281
  * bsc#1269034
  * bsc#1269196
  * bsc#1269284
  * bsc#1269822
  * bsc#1270023
  * bsc#1270024
  * bsc#1271543
  * bsc#1272139

  
Cross-References:

  * CVE-2023-53995
  * CVE-2026-46319
  * CVE-2026-46331
  * CVE-2026-52923
  * CVE-2026-52956
  * CVE-2026-52972
  * CVE-2026-53133
  * CVE-2026-53224
  * CVE-2026-53246
  * CVE-2026-64600

  
CVSS scores:

  * CVE-2023-53995 ( 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-2023-53995 ( SUSE ):  7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-46319 ( SUSE ):  7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-46319 ( NVD ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-46331 ( SUSE ):  7.8 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
  * CVE-2026-46331 ( NVD ):  6.7 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-46331 ( NVD ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-52923 ( SUSE ):  8.5
    CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-52923 ( SUSE ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-52923 ( NVD ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-52923 ( NVD ):  5.8 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H
  * CVE-2026-52956 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-52956 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-52972 ( SUSE ):  8.5
    CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-52972 ( SUSE ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-52972 ( NVD ):  7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-52972 ( NVD ):  5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-53133 ( SUSE ):  8.5
    CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-53133 ( SUSE ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-53133 ( NVD ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-53224 ( 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-2026-53224 ( SUSE ):  7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-53224 ( NVD ):  9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
  * CVE-2026-53246 ( SUSE ):  8.8
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-53246 ( SUSE ):  8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
  * CVE-2026-53246 ( NVD ):  9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-64600 ( SUSE ):  8.8
    CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
  * CVE-2026-64600 ( SUSE ):  7.8 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
  * CVE-2026-64600 ( NVD ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

  
Affected Products:

  * openSUSE Leap 15.4
  * SUSE Linux Enterprise High Performance Computing 15 SP4
  * SUSE Linux Enterprise Live Patching 15-SP4
  * SUSE Linux Enterprise Micro 5.3
  * SUSE Linux Enterprise Micro 5.4
  * SUSE Linux Enterprise Real Time 15 SP4
  * SUSE Linux Enterprise Server 15 SP4
  * SUSE Linux Enterprise Server for SAP Applications 15 SP4

  
  
An update that solves 10 vulnerabilities can now be installed.

## Description:

This update for the SUSE Linux Enterprise Kernel 5.14.21-150400.24.225 fixes
various security issues:

The following security issues were fixed:

  * CVE-2023-53995: net: ipv4: fix one memleak in __inet_del_ifa()
    (bsc#1269284).
  * CVE-2025-40204,CVE-2026-53224,CVE-2026-53246: sctp: validate cached peer
    INIT chunk length in COOKIE_ECHO processing (bsc#1253437 bsc#1270023
    bsc#1270024).
  * CVE-2026-46319: net/sched: act_ct: Only release RCU read lock after ct_ft
    (bsc#1268281).
  * CVE-2026-46331: net/sched: fix pedit partial COW leading to page cache
    (bsc#1267625).
  * CVE-2026-52923: ipc: limit next_id allocation to the valid ID range
    (bsc#1269034).
  * CVE-2026-52956: libceph: Fix potential out-of-bounds access in
    __ceph_x_decrypt() (bsc#1272139).
  * CVE-2026-52972: crypto: af_alg - Cap AEAD AD length to 0x80000000
    (bsc#1269196).
  * CVE-2026-53133: RDMA/umem: Fix truncation for block sizes >= 4G
    (bsc#1269822).
  * CVE-2026-64600: xfs: resample the data fork mapping after cycling ILOCK
    (RefluXFS) (bsc#1271543).

## 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 15.4  
    zypper in -t patch SUSE-2026-3734=1

  * SUSE Linux Enterprise Live Patching 15-SP4  
    zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP4-2026-3734=1

## Package List:

  * SUSE Linux Enterprise Live Patching 15-SP4 (ppc64le s390x x86_64)
    * kernel-livepatch-SLE15-SP4_Update_56-debugsource-4-150400.2.1
    * kernel-livepatch-5_14_21-150400_24_225-default-debuginfo-4-150400.2.1
    * kernel-livepatch-5_14_21-150400_24_225-default-4-150400.2.1
  * openSUSE Leap 15.4 (ppc64le s390x x86_64)
    * kernel-livepatch-SLE15-SP4_Update_56-debugsource-4-150400.2.1
    * kernel-livepatch-5_14_21-150400_24_225-default-debuginfo-4-150400.2.1
    * kernel-livepatch-5_14_21-150400_24_225-default-4-150400.2.1

## References:

  * https://www.suse.com/security/cve/CVE-2023-53995.html
  * https://www.suse.com/security/cve/CVE-2026-46319.html
  * https://www.suse.com/security/cve/CVE-2026-46331.html
  * https://www.suse.com/security/cve/CVE-2026-52923.html
  * https://www.suse.com/security/cve/CVE-2026-52956.html
  * https://www.suse.com/security/cve/CVE-2026-52972.html
  * https://www.suse.com/security/cve/CVE-2026-53133.html
  * https://www.suse.com/security/cve/CVE-2026-53224.html
  * https://www.suse.com/security/cve/CVE-2026-53246.html
  * https://www.suse.com/security/cve/CVE-2026-64600.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1267625
  * https://bugzilla.suse.com/show_bug.cgi?id=1268281
  * https://bugzilla.suse.com/show_bug.cgi?id=1269034
  * https://bugzilla.suse.com/show_bug.cgi?id=1269196
  * https://bugzilla.suse.com/show_bug.cgi?id=1269284
  * https://bugzilla.suse.com/show_bug.cgi?id=1269822
  * https://bugzilla.suse.com/show_bug.cgi?id=1270023
  * https://bugzilla.suse.com/show_bug.cgi?id=1270024
  * https://bugzilla.suse.com/show_bug.cgi?id=1271543
  * https://bugzilla.suse.com/show_bug.cgi?id=1272139
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