Security update for xen

Announcement ID:	SUSE-SU-2026:0012-1
Release Date:	2026-01-05T10:31:33Z
Rating:	important
References:	bsc#1027519 bsc#1248807 bsc#1251271 bsc#1252692 bsc#1254180
Cross-References:	CVE-2025-27466 CVE-2025-58142 CVE-2025-58143 CVE-2025-58147 CVE-2025-58148 CVE-2025-58149
CVSS scores:	CVE-2025-27466 ( SUSE ): 6.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H CVE-2025-27466 ( NVD ): 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVE-2025-58142 ( SUSE ): 6.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H CVE-2025-58142 ( NVD ): 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVE-2025-58143 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2025-58143 ( NVD ): 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVE-2025-58147 ( SUSE ): 6.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:H CVE-2025-58147 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVE-2025-58148 ( SUSE ): 6.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:H CVE-2025-58148 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVE-2025-58149 ( SUSE ): 4.3 CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N CVE-2025-58149 ( SUSE ): 6.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N CVE-2025-58149 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Affected Products:	Basesystem Module 15-SP6 openSUSE Leap 15.6 Server Applications Module 15-SP6 SUSE Linux Enterprise Desktop 15 SP6 SUSE Linux Enterprise Real Time 15 SP6 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 six vulnerabilities can now be installed.

Description:

This update for xen fixes the following issues:

Security issues fixed:

• CVE-2025-27466: NULL pointer dereference in the Viridian interface when updating the reference TSC area (bsc#1248807).
• CVE-2025-58142: NULL pointer dereference in the Viridian interface due to assumption that the SIM page is mapped when a synthetic timer message has to be delivered (bsc#1248807).
• CVE-2025-58143: information leak and reference counter underflow in the Viridian interface due to race in the mapping of the reference TSC page (bsc#1248807).
• CVE-2025-58147: incorrect input sanitisation in Viridian hypercalls using the HV_VP_SET Sparse format can lead to out-of-bounds write through vpmask_set() (bsc#1251271).
• CVE-2025-58148: incorrect input sanitisation in Viridian hypercalls using any input format can lead to out-of-bounds read through send_ipi() (bsc#1251271).
• CVE-2025-58149: incorrect removal of permissions on PCI device unplug allows PV guests to access memory of devices no longer assigned to them (bsc#1252692).

Other issues fixed:

• Several upstream bug fixes (bsc#1027519).
• Failure to restart xenstored (bsc#1254180).

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-2026-12=1 openSUSE-SLE-15.6-2026-12=1
• Basesystem Module 15-SP6
  zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP6-2026-12=1
• Server Applications Module 15-SP6
  zypper in -t patch SUSE-SLE-Module-Server-Applications-15-SP6-2026-12=1
• SUSE Linux Enterprise Server 15 SP6 LTSS
  zypper in -t patch SUSE-SLE-Product-SLES-15-SP6-LTSS-2026-12=1
• SUSE Linux Enterprise Server for SAP Applications 15 SP6
  zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP6-2026-12=1

Package List:

• openSUSE Leap 15.6 (aarch64 x86_64 i586)
  • xen-devel-4.18.5_08-150600.3.34.2
  • xen-libs-debuginfo-4.18.5_08-150600.3.34.2
  • xen-tools-domU-debuginfo-4.18.5_08-150600.3.34.2
  • xen-tools-domU-4.18.5_08-150600.3.34.2
  • xen-debugsource-4.18.5_08-150600.3.34.2
  • xen-libs-4.18.5_08-150600.3.34.2
• openSUSE Leap 15.6 (x86_64)
  • xen-libs-32bit-debuginfo-4.18.5_08-150600.3.34.2
  • xen-libs-32bit-4.18.5_08-150600.3.34.2
• openSUSE Leap 15.6 (aarch64 x86_64)
  • xen-4.18.5_08-150600.3.34.2
  • xen-doc-html-4.18.5_08-150600.3.34.2
  • xen-tools-debuginfo-4.18.5_08-150600.3.34.2
  • xen-tools-4.18.5_08-150600.3.34.2
• openSUSE Leap 15.6 (noarch)
  • xen-tools-xendomains-wait-disk-4.18.5_08-150600.3.34.2
• openSUSE Leap 15.6 (aarch64_ilp32)
  • xen-libs-64bit-4.18.5_08-150600.3.34.2
  • xen-libs-64bit-debuginfo-4.18.5_08-150600.3.34.2
• Basesystem Module 15-SP6 (x86_64)
  • xen-libs-debuginfo-4.18.5_08-150600.3.34.2
  • xen-tools-domU-debuginfo-4.18.5_08-150600.3.34.2
  • xen-tools-domU-4.18.5_08-150600.3.34.2
  • xen-debugsource-4.18.5_08-150600.3.34.2
  • xen-libs-4.18.5_08-150600.3.34.2
• Server Applications Module 15-SP6 (x86_64)
  • xen-4.18.5_08-150600.3.34.2
  • xen-devel-4.18.5_08-150600.3.34.2
  • xen-debugsource-4.18.5_08-150600.3.34.2
  • xen-tools-debuginfo-4.18.5_08-150600.3.34.2
  • xen-tools-4.18.5_08-150600.3.34.2
• Server Applications Module 15-SP6 (noarch)
  • xen-tools-xendomains-wait-disk-4.18.5_08-150600.3.34.2
• SUSE Linux Enterprise Server 15 SP6 LTSS (x86_64)
  • xen-4.18.5_08-150600.3.34.2
  • xen-devel-4.18.5_08-150600.3.34.2
  • xen-libs-debuginfo-4.18.5_08-150600.3.34.2
  • xen-tools-domU-debuginfo-4.18.5_08-150600.3.34.2
  • xen-tools-domU-4.18.5_08-150600.3.34.2
  • xen-debugsource-4.18.5_08-150600.3.34.2
  • xen-libs-4.18.5_08-150600.3.34.2
  • xen-tools-debuginfo-4.18.5_08-150600.3.34.2
  • xen-tools-4.18.5_08-150600.3.34.2
• SUSE Linux Enterprise Server 15 SP6 LTSS (noarch)
  • xen-tools-xendomains-wait-disk-4.18.5_08-150600.3.34.2
• SUSE Linux Enterprise Server for SAP Applications 15 SP6 (x86_64)
  • xen-4.18.5_08-150600.3.34.2
  • xen-devel-4.18.5_08-150600.3.34.2
  • xen-libs-debuginfo-4.18.5_08-150600.3.34.2
  • xen-tools-domU-debuginfo-4.18.5_08-150600.3.34.2
  • xen-tools-domU-4.18.5_08-150600.3.34.2
  • xen-debugsource-4.18.5_08-150600.3.34.2
  • xen-libs-4.18.5_08-150600.3.34.2
  • xen-tools-debuginfo-4.18.5_08-150600.3.34.2
  • xen-tools-4.18.5_08-150600.3.34.2
• SUSE Linux Enterprise Server for SAP Applications 15 SP6 (noarch)
  • xen-tools-xendomains-wait-disk-4.18.5_08-150600.3.34.2

References:

• https://www.suse.com/security/cve/CVE-2025-27466.html
• https://www.suse.com/security/cve/CVE-2025-58142.html
• https://www.suse.com/security/cve/CVE-2025-58143.html
• https://www.suse.com/security/cve/CVE-2025-58147.html
• https://www.suse.com/security/cve/CVE-2025-58148.html
• https://www.suse.com/security/cve/CVE-2025-58149.html
• https://bugzilla.suse.com/show_bug.cgi?id=1027519
• https://bugzilla.suse.com/show_bug.cgi?id=1248807
• https://bugzilla.suse.com/show_bug.cgi?id=1251271
• https://bugzilla.suse.com/show_bug.cgi?id=1252692
• https://bugzilla.suse.com/show_bug.cgi?id=1254180