Security update for xen

Announcement ID:	SUSE-SU-2026:0394-1
Release Date:	2026-02-05T15:42:11Z
Rating:	moderate
References:	bsc#1252692 bsc#1254180 bsc#1256745 bsc#1256747
Cross-References:	CVE-2025-58149 CVE-2025-58150 CVE-2026-23553
CVSS scores:	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 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-2025-58150 ( NVD ): 8.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H 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 CVE-2026-23553 ( NVD ): 2.9 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Affected Products:	openSUSE Leap 15.4 SUSE Linux Enterprise Micro 5.3 SUSE Linux Enterprise Micro 5.4 SUSE Linux Enterprise Micro for Rancher 5.3 SUSE Linux Enterprise Micro for Rancher 5.4

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

Description:

This update for xen fixes the following issues:

Security fixes:

• 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)
• CVE-2025-58149: Fixed incorrect removal od permissions on PCI device unplug allow PV guests to access memory of devices no longer assigned to it (XSA-476) (bsc#1252692)

Other fixes:

• Fixed virtxend service restart. Caused by a failure to start 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 15.4
  zypper in -t patch SUSE-2026-394=1
• SUSE Linux Enterprise Micro for Rancher 5.3
  zypper in -t patch SUSE-SLE-Micro-5.3-2026-394=1
• SUSE Linux Enterprise Micro 5.3
  zypper in -t patch SUSE-SLE-Micro-5.3-2026-394=1
• SUSE Linux Enterprise Micro for Rancher 5.4
  zypper in -t patch SUSE-SLE-Micro-5.4-2026-394=1
• SUSE Linux Enterprise Micro 5.4
  zypper in -t patch SUSE-SLE-Micro-5.4-2026-394=1

Package List:

• openSUSE Leap 15.4 (aarch64 x86_64 i586)
  • xen-debugsource-4.16.7_06-150400.4.78.1
  • xen-tools-domU-debuginfo-4.16.7_06-150400.4.78.1
  • xen-libs-4.16.7_06-150400.4.78.1
  • xen-tools-domU-4.16.7_06-150400.4.78.1
  • xen-devel-4.16.7_06-150400.4.78.1
  • xen-libs-debuginfo-4.16.7_06-150400.4.78.1
• openSUSE Leap 15.4 (x86_64)
  • xen-libs-32bit-4.16.7_06-150400.4.78.1
  • xen-libs-32bit-debuginfo-4.16.7_06-150400.4.78.1
• openSUSE Leap 15.4 (aarch64 x86_64)
  • xen-tools-4.16.7_06-150400.4.78.1
  • xen-tools-debuginfo-4.16.7_06-150400.4.78.1
  • xen-4.16.7_06-150400.4.78.1
  • xen-doc-html-4.16.7_06-150400.4.78.1
• openSUSE Leap 15.4 (noarch)
  • xen-tools-xendomains-wait-disk-4.16.7_06-150400.4.78.1
• openSUSE Leap 15.4 (aarch64_ilp32)
  • xen-libs-64bit-4.16.7_06-150400.4.78.1
  • xen-libs-64bit-debuginfo-4.16.7_06-150400.4.78.1
• SUSE Linux Enterprise Micro for Rancher 5.3 (x86_64)
  • xen-libs-debuginfo-4.16.7_06-150400.4.78.1
  • xen-libs-4.16.7_06-150400.4.78.1
  • xen-debugsource-4.16.7_06-150400.4.78.1
• SUSE Linux Enterprise Micro 5.3 (x86_64)
  • xen-libs-debuginfo-4.16.7_06-150400.4.78.1
  • xen-libs-4.16.7_06-150400.4.78.1
  • xen-debugsource-4.16.7_06-150400.4.78.1
• SUSE Linux Enterprise Micro for Rancher 5.4 (x86_64)
  • xen-libs-debuginfo-4.16.7_06-150400.4.78.1
  • xen-libs-4.16.7_06-150400.4.78.1
  • xen-debugsource-4.16.7_06-150400.4.78.1
• SUSE Linux Enterprise Micro 5.4 (x86_64)
  • xen-libs-debuginfo-4.16.7_06-150400.4.78.1
  • xen-libs-4.16.7_06-150400.4.78.1
  • xen-debugsource-4.16.7_06-150400.4.78.1

References:

• https://www.suse.com/security/cve/CVE-2025-58149.html
• 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=1252692
• https://bugzilla.suse.com/show_bug.cgi?id=1254180
• https://bugzilla.suse.com/show_bug.cgi?id=1256745
• https://bugzilla.suse.com/show_bug.cgi?id=1256747