SUSE-SU-2026:4088-1: moderate: Security update for xen

[SLE-SECURITY-UPDATES]

# Security update for xen

Announcement ID: SUSE-SU-2026:4088-1  
Release Date: 2026-09-08T12:26:33Z  
Rating: moderate  
References:

  * bsc#1276838
  * bsc#1276839
  * bsc#1276841

  
Cross-References:

  * CVE-2026-62437
  * CVE-2026-79602
  * CVE-2026-79603

  
CVSS scores:

  * CVE-2026-62437 ( SUSE ):  6.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
  * CVE-2026-79602 ( SUSE ):  6.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
  * CVE-2026-79603 ( SUSE ):  5.2 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
  * CVE-2026-79603 ( NVD ):  4.3 CVSS:3.1/AV:N/AC:L/PR:L/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 can now be installed.

## Description:

This update for xen fixes the following issues:

  * CVE-2026-62437: x86: DMs may cause mem leak by IRQ binding (bsc#1276838).
  * CVE-2026-79602: x86: improper handling of HVM emulation return codes
    (bsc#1276839).
  * CVE-2026-79603: unconditionally do TLB flushing ahead of page scrubbing
    (bsc#1276841).

## 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-2026-4088=1

  * SUSE Linux Enterprise Micro for Rancher 5.3  
    zypper in -t patch SUSE-SLE-Micro-5.3-2026-4088=1

  * SUSE Linux Enterprise Micro 5.3  
    zypper in -t patch SUSE-SLE-Micro-5.3-2026-4088=1

  * SUSE Linux Enterprise Micro for Rancher 5.4  
    zypper in -t patch SUSE-SLE-Micro-5.4-2026-4088=1

  * SUSE Linux Enterprise Micro 5.4  
    zypper in -t patch SUSE-SLE-Micro-5.4-2026-4088=1

## Package List:

  * openSUSE Leap 15.4 (x86_64)
    * xen-libs-32bit-4.16.7_14-150400.4.92.1
    * xen-tools-debuginfo-4.16.7_14-150400.4.92.1
    * xen-tools-4.16.7_14-150400.4.92.1
    * xen-libs-32bit-debuginfo-4.16.7_14-150400.4.92.1
    * xen-4.16.7_14-150400.4.92.1
    * xen-doc-html-4.16.7_14-150400.4.92.1
  * openSUSE Leap 15.4 (i586 x86_64)
    * xen-debugsource-4.16.7_14-150400.4.92.1
    * xen-tools-domU-4.16.7_14-150400.4.92.1
    * xen-tools-domU-debuginfo-4.16.7_14-150400.4.92.1
    * xen-libs-debuginfo-4.16.7_14-150400.4.92.1
    * xen-devel-4.16.7_14-150400.4.92.1
    * xen-libs-4.16.7_14-150400.4.92.1
  * openSUSE Leap 15.4 (noarch)
    * xen-tools-xendomains-wait-disk-4.16.7_14-150400.4.92.1
  * SUSE Linux Enterprise Micro for Rancher 5.3 (x86_64)
    * xen-debugsource-4.16.7_14-150400.4.92.1
    * xen-libs-debuginfo-4.16.7_14-150400.4.92.1
    * xen-libs-4.16.7_14-150400.4.92.1
  * SUSE Linux Enterprise Micro 5.3 (x86_64)
    * xen-debugsource-4.16.7_14-150400.4.92.1
    * xen-libs-debuginfo-4.16.7_14-150400.4.92.1
    * xen-libs-4.16.7_14-150400.4.92.1
  * SUSE Linux Enterprise Micro for Rancher 5.4 (x86_64)
    * xen-debugsource-4.16.7_14-150400.4.92.1
    * xen-libs-debuginfo-4.16.7_14-150400.4.92.1
    * xen-libs-4.16.7_14-150400.4.92.1
  * SUSE Linux Enterprise Micro 5.4 (x86_64)
    * xen-debugsource-4.16.7_14-150400.4.92.1
    * xen-libs-debuginfo-4.16.7_14-150400.4.92.1
    * xen-libs-4.16.7_14-150400.4.92.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-62437.html
  * https://www.suse.com/security/cve/CVE-2026-79602.html
  * https://www.suse.com/security/cve/CVE-2026-79603.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1276838
  * https://bugzilla.suse.com/show_bug.cgi?id=1276839
  * https://bugzilla.suse.com/show_bug.cgi?id=1276841

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