SUSE-SU-2026:1743-1: important: Security update for xen

Thu May 7 16:31:31 UTC 2026

# Security update for xen

Announcement ID: SUSE-SU-2026:1743-1  
Release Date: 2026-05-07T07:15:57Z  
Rating: important  
References:

  * bsc#1027519
  * bsc#1262178
  * bsc#1262180
  * bsc#1262428
  * jsc#PED-8907

Cross-References:

  * CVE-2025-54505
  * 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-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-2026-23558 ( 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

Affected Products:

  * Basesystem Module 15-SP7
  * Server Applications Module 15-SP7
  * SUSE Linux Enterprise Desktop 15 SP7
  * SUSE Linux Enterprise Real Time 15 SP7
  * SUSE Linux Enterprise Server 15 SP7
  * SUSE Linux Enterprise Server for SAP Applications 15 SP7

An update that solves three vulnerabilities, contains one feature and has one
security fix can now be installed.

## Description:

This update for xen fixes the following issues:

  * Update to Xen 4.20.3 bug fix release (bsc#1027519) (jsc#PED-8907).
  * CVE-2025-54505: Floating Point Divider State Sampling on AMD CPUs AMD-
    SN-7053 (bsc#1262428).
  * 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:

  * Basesystem Module 15-SP7  
    zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP7-2026-1743=1

  * Server Applications Module 15-SP7  
    zypper in -t patch SUSE-SLE-Module-Server-Applications-15-SP7-2026-1743=1

## Package List:

  * Basesystem Module 15-SP7 (x86_64)
    * xen-libs-debuginfo-4.20.3_02-150700.3.33.1
    * xen-debugsource-4.20.3_02-150700.3.33.1
    * xen-tools-domU-4.20.3_02-150700.3.33.1
    * xen-tools-domU-debuginfo-4.20.3_02-150700.3.33.1
    * xen-libs-4.20.3_02-150700.3.33.1
  * Server Applications Module 15-SP7 (x86_64)
    * xen-tools-4.20.3_02-150700.3.33.1
    * xen-4.20.3_02-150700.3.33.1
    * xen-debugsource-4.20.3_02-150700.3.33.1
    * xen-tools-debuginfo-4.20.3_02-150700.3.33.1
    * xen-devel-4.20.3_02-150700.3.33.1
  * Server Applications Module 15-SP7 (noarch)
    * xen-tools-xendomains-wait-disk-4.20.3_02-150700.3.33.1

## References:

  * https://www.suse.com/security/cve/CVE-2025-54505.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=1027519
  * 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://jira.suse.com/browse/PED-8907

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