SUSE-SU-2026:0306-1: moderate: Security update for xen

[SLE-SECURITY-UPDATES]

# Security update for xen

Announcement ID: SUSE-SU-2026:0306-1  
Release Date: 2026-01-27T16:15:20Z  
Rating: moderate  
References:

  * bsc#1256745
  * bsc#1256747

  
Cross-References:

  * CVE-2025-58150
  * CVE-2026-23553

  
CVSS scores:

  * CVE-2025-58150 ( SUSE ):  4.8
    CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
  * CVE-2025-58150 ( SUSE ):  5.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
  * CVE-2026-23553 ( SUSE ):  6.8
    CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-23553 ( SUSE ):  5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

  
Affected Products:

  * openSUSE Leap 15.6

  
  
An update that solves two vulnerabilities can now be installed.

## Description:

This update for xen fixes the following issues:

  * CVE-2025-58150: Fixed buffer overrun with shadow paging and tracing
    (XSA-477) (bsc#1256745)
  * CVE-2026-23553: Fixed incomplete IBPB for vCPU isolation (XSA-479)
    (bsc#1256747)

## 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:

  * openSUSE Leap 15.6  
    zypper in -t patch SUSE-2026-306=1 openSUSE-SLE-15.6-2026-306=1

## Package List:

  * openSUSE Leap 15.6 (aarch64 x86_64 i586)
    * xen-tools-domU-debuginfo-4.18.5_10-150600.3.37.1
    * xen-tools-domU-4.18.5_10-150600.3.37.1
    * xen-debugsource-4.18.5_10-150600.3.37.1
    * xen-libs-debuginfo-4.18.5_10-150600.3.37.1
    * xen-libs-4.18.5_10-150600.3.37.1
    * xen-devel-4.18.5_10-150600.3.37.1
  * openSUSE Leap 15.6 (x86_64)
    * xen-libs-32bit-4.18.5_10-150600.3.37.1
    * xen-libs-32bit-debuginfo-4.18.5_10-150600.3.37.1
  * openSUSE Leap 15.6 (aarch64 x86_64)
    * xen-tools-debuginfo-4.18.5_10-150600.3.37.1
    * xen-tools-4.18.5_10-150600.3.37.1
    * xen-4.18.5_10-150600.3.37.1
    * xen-doc-html-4.18.5_10-150600.3.37.1
  * openSUSE Leap 15.6 (noarch)
    * xen-tools-xendomains-wait-disk-4.18.5_10-150600.3.37.1
  * openSUSE Leap 15.6 (aarch64_ilp32)
    * xen-libs-64bit-debuginfo-4.18.5_10-150600.3.37.1
    * xen-libs-64bit-4.18.5_10-150600.3.37.1

## References:

  * https://www.suse.com/security/cve/CVE-2025-58150.html
  * https://www.suse.com/security/cve/CVE-2026-23553.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1256745
  * https://bugzilla.suse.com/show_bug.cgi?id=1256747

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.suse.com/pipermail/sle-security-updates/attachments/20260128/fe27cb19/attachment.htm>