SUSE-SU-2026:2066-1: important: Security update for xen

Tue May 26 12:32:33 UTC 2026

# Security update for xen

Announcement ID: SUSE-SU-2026:2066-1  
Release Date: 2026-05-26T07:28:46Z  
Rating: important  
References:

  * bsc#1262178
  * bsc#1262180
  * bsc#1262428
  * bsc#1264066

Cross-References:

  * CVE-2025-54505
  * CVE-2025-54518
  * CVE-2026-23557
  * CVE-2026-23558

CVSS scores:

  * CVE-2025-54505 ( SUSE ):  6.9
    CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
  * CVE-2025-54505 ( SUSE ):  5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
  * CVE-2025-54505 ( NVD ):  2.0
    CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
  * CVE-2025-54518 ( 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-2025-54518 ( SUSE ):  7.4 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
  * CVE-2025-54518 ( NVD ):  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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
  * CVE-2026-23557 ( SUSE ):  6.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
  * CVE-2026-23557 ( NVD ):  6.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
  * CVE-2026-23558 ( 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-2026-23558 ( SUSE ):  7.8 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
  * CVE-2026-23558 ( NVD ):  7.8 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected Products:

  * SUSE Linux Enterprise High Performance Computing 12 SP5
  * SUSE Linux Enterprise Server 12 SP5
  * SUSE Linux Enterprise Server 12 SP5 LTSS
  * SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security
  * SUSE Linux Enterprise Server for SAP Applications 12 SP5

An update that solves four vulnerabilities can now be installed.

## Description:

This update for xen fixes the following issues

  * CVE-2025-54505: Floating Point Divider State Sampling on AMD CPUs AMD-
    SN-7053 (bsc#1262428).
  * CVE-2025-54518: AMD-SN-7052: CPU OP Cache Corruption (bsc#1264066).
  * CVE-2026-23557: Xenstored DoS via XS_RESET_WATCHES command (bsc#1262178).
  * CVE-2026-23558: grant table v2 race in status page mapping (bsc#1262180).

## 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 12 SP5 LTSS  
    zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-2026-2066=1

  * SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security  
    zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-EXTENDED-SECURITY-2026-2066=1

## Package List:

  * SUSE Linux Enterprise Server 12 SP5 LTSS (aarch64 x86_64)
    * xen-devel-4.12.4_68-3.142.1
  * SUSE Linux Enterprise Server 12 SP5 LTSS (x86_64)
    * xen-4.12.4_68-3.142.1
    * xen-libs-debuginfo-4.12.4_68-3.142.1
    * xen-tools-domU-4.12.4_68-3.142.1
    * xen-libs-32bit-4.12.4_68-3.142.1
    * xen-debugsource-4.12.4_68-3.142.1
    * xen-tools-debuginfo-4.12.4_68-3.142.1
    * xen-tools-domU-debuginfo-4.12.4_68-3.142.1
    * xen-tools-4.12.4_68-3.142.1
    * xen-doc-html-4.12.4_68-3.142.1
    * xen-libs-debuginfo-32bit-4.12.4_68-3.142.1
    * xen-libs-4.12.4_68-3.142.1
  * SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security (x86_64)
    * xen-4.12.4_68-3.142.1
    * xen-libs-debuginfo-4.12.4_68-3.142.1
    * xen-tools-domU-4.12.4_68-3.142.1
    * xen-libs-32bit-4.12.4_68-3.142.1
    * xen-devel-4.12.4_68-3.142.1
    * xen-debugsource-4.12.4_68-3.142.1
    * xen-tools-debuginfo-4.12.4_68-3.142.1
    * xen-tools-domU-debuginfo-4.12.4_68-3.142.1
    * xen-tools-4.12.4_68-3.142.1
    * xen-doc-html-4.12.4_68-3.142.1
    * xen-libs-debuginfo-32bit-4.12.4_68-3.142.1
    * xen-libs-4.12.4_68-3.142.1

## References:

  * https://www.suse.com/security/cve/CVE-2025-54505.html
  * https://www.suse.com/security/cve/CVE-2025-54518.html
  * https://www.suse.com/security/cve/CVE-2026-23557.html
  * https://www.suse.com/security/cve/CVE-2026-23558.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1262178
  * https://bugzilla.suse.com/show_bug.cgi?id=1262180
  * https://bugzilla.suse.com/show_bug.cgi?id=1262428
  * https://bugzilla.suse.com/show_bug.cgi?id=1264066

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