Security update for xen

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