SUSE-SU-2026:0908-1: important: Security update for xen

[SLE-SECURITY-UPDATES]

# Security update for xen

Announcement ID: SUSE-SU-2026:0908-1  
Release Date: 2026-03-17T16:32:42Z  
Rating: important  
References:

  * bsc#1259247
  * bsc#1259248

  
Cross-References:

  * CVE-2026-23554
  * CVE-2026-23555

  
CVSS scores:

  * CVE-2026-23554 ( SUSE ):  7.3
    CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-23554 ( SUSE ):  7.8 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
  * CVE-2026-23555 ( SUSE ):  8.2
    CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H
  * CVE-2026-23555 ( SUSE ):  7.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

  
Affected Products:

  * openSUSE Leap 15.6
  * SUSE Linux Enterprise Server 15 SP6
  * SUSE Linux Enterprise Server 15 SP6 LTSS
  * SUSE Linux Enterprise Server for SAP Applications 15 SP6

  
  
An update that solves two vulnerabilities can now be installed.

## Description:

This update for xen fixes the following issues:

  * CVE-2026-23554: xen: Use after free of paging structures in EPT
    (bsc#1259247, XSA-480)
  * CVE-2026-23555: xen: Xenstored DoS by unprivileged domain (bsc#1259248,
    XSA-481)

## 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 15.6  
    zypper in -t patch openSUSE-SLE-15.6-2026-908=1

  * SUSE Linux Enterprise Server 15 SP6 LTSS  
    zypper in -t patch SUSE-SLE-Product-SLES-15-SP6-LTSS-2026-908=1

  * SUSE Linux Enterprise Server for SAP Applications 15 SP6  
    zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP6-2026-908=1

## Package List:

  * openSUSE Leap 15.6 (aarch64 x86_64)
    * xen-libs-4.18.5_12-150600.3.40.1
    * xen-doc-html-4.18.5_12-150600.3.40.1
    * xen-devel-4.18.5_12-150600.3.40.1
    * xen-tools-domU-4.18.5_12-150600.3.40.1
    * xen-tools-debuginfo-4.18.5_12-150600.3.40.1
    * xen-debugsource-4.18.5_12-150600.3.40.1
    * xen-4.18.5_12-150600.3.40.1
    * xen-tools-domU-debuginfo-4.18.5_12-150600.3.40.1
    * xen-libs-debuginfo-4.18.5_12-150600.3.40.1
    * xen-tools-4.18.5_12-150600.3.40.1
  * openSUSE Leap 15.6 (x86_64)
    * xen-libs-32bit-4.18.5_12-150600.3.40.1
    * xen-libs-32bit-debuginfo-4.18.5_12-150600.3.40.1
  * openSUSE Leap 15.6 (noarch)
    * xen-tools-xendomains-wait-disk-4.18.5_12-150600.3.40.1
  * SUSE Linux Enterprise Server 15 SP6 LTSS (x86_64)
    * xen-libs-4.18.5_12-150600.3.40.1
    * xen-devel-4.18.5_12-150600.3.40.1
    * xen-tools-domU-4.18.5_12-150600.3.40.1
    * xen-tools-debuginfo-4.18.5_12-150600.3.40.1
    * xen-debugsource-4.18.5_12-150600.3.40.1
    * xen-4.18.5_12-150600.3.40.1
    * xen-tools-domU-debuginfo-4.18.5_12-150600.3.40.1
    * xen-libs-debuginfo-4.18.5_12-150600.3.40.1
    * xen-tools-4.18.5_12-150600.3.40.1
  * SUSE Linux Enterprise Server 15 SP6 LTSS (noarch)
    * xen-tools-xendomains-wait-disk-4.18.5_12-150600.3.40.1
  * SUSE Linux Enterprise Server for SAP Applications 15 SP6 (x86_64)
    * xen-libs-4.18.5_12-150600.3.40.1
    * xen-devel-4.18.5_12-150600.3.40.1
    * xen-tools-domU-4.18.5_12-150600.3.40.1
    * xen-tools-debuginfo-4.18.5_12-150600.3.40.1
    * xen-debugsource-4.18.5_12-150600.3.40.1
    * xen-4.18.5_12-150600.3.40.1
    * xen-tools-domU-debuginfo-4.18.5_12-150600.3.40.1
    * xen-libs-debuginfo-4.18.5_12-150600.3.40.1
    * xen-tools-4.18.5_12-150600.3.40.1
  * SUSE Linux Enterprise Server for SAP Applications 15 SP6 (noarch)
    * xen-tools-xendomains-wait-disk-4.18.5_12-150600.3.40.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-23554.html
  * https://www.suse.com/security/cve/CVE-2026-23555.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1259247
  * https://bugzilla.suse.com/show_bug.cgi?id=1259248

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