SUSE-SU-2026:23792-1: important: Security update for the Linux Kernel RT (Live Patch 15 for SUSE Linux Enterprise 16)

SLE-UPDATES null at suse.de
Mon Sep 21 08:37:10 UTC 2026 

# Security update for the Linux Kernel RT (Live Patch 15 for SUSE Linux
Enterprise 16)

Announcement ID: SUSE-SU-2026:23792-1  
Release Date: 2026-09-14T13:02:10Z  
Rating: important  
References:

  * bsc#1271923
  * bsc#1271924
  * bsc#1271925
  * bsc#1273232
  * bsc#1274074
  * bsc#1274942
  * bsc#1275458

  
Cross-References:

  * CVE-2026-15811
  * CVE-2026-15812
  * CVE-2026-15813
  * CVE-2026-64423
  * CVE-2026-64561
  * CVE-2026-64564
  * CVE-2026-68138

  
CVSS scores:

  * CVE-2026-15811 ( SUSE ):  5.8 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:L
  * CVE-2026-15811 ( NVD ):  5.8 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:L
  * CVE-2026-15812 ( SUSE ):  4.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
  * CVE-2026-15812 ( NVD ):  4.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
  * CVE-2026-15813 ( SUSE ):  6.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
  * CVE-2026-15813 ( NVD ):  6.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
  * CVE-2026-64423 ( SUSE ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-64423 ( NVD ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-64561 ( SUSE ):  9.3
    CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
  * CVE-2026-64561 ( SUSE ):  8.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
  * CVE-2026-64561 ( NVD ):  8.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
  * CVE-2026-64564 ( 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-2026-64564 ( SUSE ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-64564 ( NVD ):  9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-68138 ( 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-2026-68138 ( SUSE ):  7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-68138 ( 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 for SAP applications 16.0
  * SUSE Linux Micro 6.2

  
  
An update that solves seven vulnerabilities can now be installed.

## Security update for the Linux Kernel RT (Live Patch 15 for SUSE Linux
Enterprise 16)

### Description:

This update for the SUSE Linux Enterprise Kernel 6.12.0-160000.36.1 fixes
various security issues:

The following security issues were fixed:

  * CVE-2026-64423: ipv4: igmp: remove multicast group from hash table on device
    destruction (bsc#1275458).
  * CVE-2026-64561: KVM: x86: Check for invalid/obsolete root _after_ making MMU
    pages available (Zapscape) (bsc#1273232).
  * CVE-2026-64564: sctp: don't free the ASCONF's own transport in DEL-IP
    processing (SCTPhantom) (bsc#1274074).
  * CVE-2026-68138: net/sched: serialize qdisc_rtab_list against concurrent
    get/put (bsc#1274942).

## Security update for kronosnet

### Description:

This update for kronosnet fixes the following issues:

  * CVE-2026-15811: improper sanitization of sensitive memory locations
    following cryptographic configuration adjustments can lead to potential
    exposure of encryption keys (bsc#1271923).
  * CVE-2026-15812: improper verification of packet origins allows for access
    control list (ACL) bypass via ID spoofing (bsc#1271924).
  * CVE-2026-15813: improper validation during fragment reassembly can trigger
    memory corruption or out-of-bounds memory access (bsc#1271925).

## 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 6.2  
    zypper in -t patch SUSE-SL-Micro-6.2-1681

  * SUSE Linux Enterprise Server for SAP applications 16.0  
    zypper in -t patch SUSE-SLES-16.0-1682

## Package List:

  * SUSE Linux Micro 6.2 (x86_64)
    * kernel-livepatch-6_12_0-160000_36-rt-debuginfo-3-160000.1.1
    * kernel-livepatch-SLE16-RT_Update_15-debugsource-3-160000.1.1
    * kernel-livepatch-6_12_0-160000_36-rt-3-160000.1.1
  * SUSE Linux Enterprise Server for SAP applications 16.0 (ppc64le x86_64)
    * libknet1-crypto-nss-plugin-1.30-160000.4.1
    * libknet-devel-1.30-160000.4.1
    * libknet1-compress-zlib-plugin-debuginfo-1.30-160000.4.1
    * libknet1-1.30-160000.4.1
    * libknet1-compress-lzma-plugin-debuginfo-1.30-160000.4.1
    * libknet1-compress-plugins-all-1.30-160000.4.1
    * libknet1-crypto-openssl-plugin-debuginfo-1.30-160000.4.1
    * libnozzle1-debuginfo-1.30-160000.4.1
    * libknet1-compress-lzma-plugin-1.30-160000.4.1
    * kronosnet-debuginfo-1.30-160000.4.1
    * libnozzle1-1.30-160000.4.1
    * libknet1-compress-zstd-plugin-1.30-160000.4.1
    * libknet1-crypto-openssl-plugin-1.30-160000.4.1
    * libknet1-compress-lzo2-plugin-1.30-160000.4.1
    * libknet1-compress-lz4-plugin-1.30-160000.4.1
    * libknet1-compress-zlib-plugin-1.30-160000.4.1
    * libknet1-compress-zstd-plugin-debuginfo-1.30-160000.4.1
    * kronosnet-debugsource-1.30-160000.4.1
    * libknet1-debuginfo-1.30-160000.4.1
    * libknet1-compress-lzo2-plugin-debuginfo-1.30-160000.4.1
    * libnozzle-devel-1.30-160000.4.1
    * libknet1-compress-lz4-plugin-debuginfo-1.30-160000.4.1
    * libknet1-plugins-all-1.30-160000.4.1
    * libknet1-compress-bzip2-plugin-1.30-160000.4.1
    * libknet1-crypto-plugins-all-1.30-160000.4.1
    * libknet1-compress-bzip2-plugin-debuginfo-1.30-160000.4.1
    * libknet1-crypto-nss-plugin-debuginfo-1.30-160000.4.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-15811.html
  * https://www.suse.com/security/cve/CVE-2026-15812.html
  * https://www.suse.com/security/cve/CVE-2026-15813.html
  * https://www.suse.com/security/cve/CVE-2026-64423.html
  * https://www.suse.com/security/cve/CVE-2026-64561.html
  * https://www.suse.com/security/cve/CVE-2026-64564.html
  * https://www.suse.com/security/cve/CVE-2026-68138.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1271923
  * https://bugzilla.suse.com/show_bug.cgi?id=1271924
  * https://bugzilla.suse.com/show_bug.cgi?id=1271925
  * https://bugzilla.suse.com/show_bug.cgi?id=1273232
  * https://bugzilla.suse.com/show_bug.cgi?id=1274074
  * https://bugzilla.suse.com/show_bug.cgi?id=1274942
  * https://bugzilla.suse.com/show_bug.cgi?id=1275458

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