SUSE-SU-2026:23460-1: important: Security update for libvirt

SLE-SECURITY-UPDATES null at suse.de
Wed Sep 9 13:47:33 UTC 2026 

# Security update for libvirt

Announcement ID: SUSE-SU-2026:23460-1  
Release Date: 2026-09-02T09:44:39Z  
Rating: important  
References:

  * bsc#1274576
  * bsc#1274946
  * bsc#1275264
  * bsc#1275265
  * bsc#1275863

  
Cross-References:

  * CVE-2026-18917
  * CVE-2026-61477
  * CVE-2026-63622
  * CVE-2026-63623
  * CVE-2026-77159

  
CVSS scores:

  * CVE-2026-18917 ( SUSE ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-18917 ( NVD ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-61477 ( SUSE ):  5.1
    CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-61477 ( SUSE ):  2.3 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
  * CVE-2026-61477 ( NVD ):  2.3 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
  * CVE-2026-63622 ( SUSE ):  8.5
    CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-63622 ( SUSE ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-63622 ( NVD ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-63623 ( SUSE ):  5.7
    CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-63623 ( SUSE ):  4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
  * CVE-2026-63623 ( NVD ):  5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
  * CVE-2026-77159 ( SUSE ):  8.5
    CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-77159 ( SUSE ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

  
Affected Products:

  * SUSE Linux Micro 6.2

  
  
An update that solves five vulnerabilities can now be installed.

## Description:

This update for libvirt fixes the following issues:

  * CVE-2026-18917: integer overflow in `NodeGetFreePages` RPC handler leads to
    heap buffer overflow and allows for possible local privilege escalation
    (bsc#1275863).
  * CVE-2026-61477: newline injection in network XML DNS TXT/SRV fields allows
    for `dnsmasq` configuration directive injection and can lead to arbitrary
    code execution as root (bsc#1274576).
  * CVE-2026-63622: symlink-following in `virFileChownFiles()` allows `swtpm`
    user to trick the root-level `libvirt` daemon into changing the ownership of
    an arbitrary file and can lead to privilege escalation (bsc#1275264).
  * CVE-2026-63623: newly created volume images are temporarily world-readable
    during clone/convert operations, which can lead to sensitive information
    disclosure (bsc#1275265).
  * CVE-2026-77159: root `chown()` on `swtpm` logfile follows symlinks and
    allows for root-owned file ownership changes, which can lead to privilege
    escalation (bsc#1274946).

## 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:

  * SUSE Linux Micro 6.2  
    zypper in -t patch SUSE-SL-Micro-6.2-1586=1

## Package List:

  * SUSE Linux Micro 6.2 (aarch64 ppc64le s390x x86_64)
    * libvirt-daemon-driver-storage-logical-debuginfo-11.4.0-160000.5.1
    * libvirt-daemon-proxy-11.4.0-160000.5.1
    * libvirt-daemon-driver-storage-11.4.0-160000.5.1
    * libvirt-daemon-plugin-lockd-11.4.0-160000.5.1
    * libvirt-daemon-driver-storage-mpath-11.4.0-160000.5.1
    * libvirt-daemon-driver-storage-disk-debuginfo-11.4.0-160000.5.1
    * libvirt-daemon-common-11.4.0-160000.5.1
    * libvirt-daemon-plugin-lockd-debuginfo-11.4.0-160000.5.1
    * libvirt-daemon-driver-storage-logical-11.4.0-160000.5.1
    * libvirt-daemon-driver-network-11.4.0-160000.5.1
    * libvirt-daemon-driver-storage-core-11.4.0-160000.5.1
    * libvirt-daemon-driver-storage-iscsi-11.4.0-160000.5.1
    * libvirt-libs-11.4.0-160000.5.1
    * libvirt-libs-debuginfo-11.4.0-160000.5.1
    * libvirt-client-debuginfo-11.4.0-160000.5.1
    * libvirt-daemon-driver-nodedev-11.4.0-160000.5.1
    * libvirt-daemon-qemu-11.4.0-160000.5.1
    * libvirt-daemon-driver-storage-core-debuginfo-11.4.0-160000.5.1
    * libvirt-daemon-driver-nodedev-debuginfo-11.4.0-160000.5.1
    * libvirt-daemon-driver-storage-iscsi-debuginfo-11.4.0-160000.5.1
    * libvirt-daemon-driver-storage-iscsi-direct-11.4.0-160000.5.1
    * libvirt-daemon-driver-qemu-debuginfo-11.4.0-160000.5.1
    * libvirt-daemon-driver-storage-scsi-11.4.0-160000.5.1
    * libvirt-daemon-log-11.4.0-160000.5.1
    * libvirt-daemon-lock-debuginfo-11.4.0-160000.5.1
    * libvirt-daemon-driver-storage-scsi-debuginfo-11.4.0-160000.5.1
    * libvirt-nss-11.4.0-160000.5.1
    * libvirt-daemon-lock-11.4.0-160000.5.1
    * libvirt-daemon-log-debuginfo-11.4.0-160000.5.1
    * libvirt-daemon-driver-nwfilter-11.4.0-160000.5.1
    * libvirt-daemon-driver-storage-disk-11.4.0-160000.5.1
    * libvirt-daemon-driver-secret-11.4.0-160000.5.1
    * libvirt-daemon-config-nwfilter-11.4.0-160000.5.1
    * libvirt-daemon-driver-nwfilter-debuginfo-11.4.0-160000.5.1
    * libvirt-daemon-driver-qemu-11.4.0-160000.5.1
    * libvirt-daemon-hooks-11.4.0-160000.5.1
    * libvirt-daemon-proxy-debuginfo-11.4.0-160000.5.1
    * libvirt-nss-debuginfo-11.4.0-160000.5.1
    * libvirt-daemon-driver-storage-mpath-debuginfo-11.4.0-160000.5.1
    * libvirt-client-qemu-11.4.0-160000.5.1
    * libvirt-daemon-driver-storage-iscsi-direct-debuginfo-11.4.0-160000.5.1
    * libvirt-debugsource-11.4.0-160000.5.1
    * libvirt-daemon-config-network-11.4.0-160000.5.1
    * libvirt-daemon-driver-network-debuginfo-11.4.0-160000.5.1
    * libvirt-client-11.4.0-160000.5.1
    * libvirt-daemon-driver-secret-debuginfo-11.4.0-160000.5.1
    * libvirt-daemon-common-debuginfo-11.4.0-160000.5.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-18917.html
  * https://www.suse.com/security/cve/CVE-2026-61477.html
  * https://www.suse.com/security/cve/CVE-2026-63622.html
  * https://www.suse.com/security/cve/CVE-2026-63623.html
  * https://www.suse.com/security/cve/CVE-2026-77159.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1274576
  * https://bugzilla.suse.com/show_bug.cgi?id=1274946
  * https://bugzilla.suse.com/show_bug.cgi?id=1275264
  * https://bugzilla.suse.com/show_bug.cgi?id=1275265
  * https://bugzilla.suse.com/show_bug.cgi?id=1275863

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