SUSE-SU-2026:23445-1: important: Security update for libvirt

SLE-SECURITY-UPDATES null at suse.de
Fri Sep 4 12:34:29 UTC 2026 

# Security update for libvirt

Announcement ID: SUSE-SU-2026:23445-1  
Release Date: 2026-09-02T09:39:32Z  
Rating: important  
References:

  * bsc#1258345
  * 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

  
Affected Products:

  * SUSE Linux Micro 6.0

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

## Description:

This update for libvirt fixes the following issues:

  * CVE-2026-18917: Integer overflow in NodeGetFreePages RPC handler leading to
    heap buffer overflow (bsc#1275863).
  * CVE-2026-61477: newline injection in network XML DNS TXT/SRV fields allows
    dnsmasq config directive injection (bsc#1274576).
  * CVE-2026-63622: `swtpm` privilege escalation via symlink following
    (bsc#1275264).
  * CVE-2026-63623: information disclosure via world-readable storage volume
    images during clone/convert (bsc#1275265).
  * CVE-2026-77159: root `chown()` on `swtpm` logfile follows symlinks
    (bsc#1274946).

Changes for libvirt:

  * rpc: avoid leak of GSource in use for interrupting main loop bsc#1258345

## 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 6.0  
    zypper in -t patch SUSE-SLE-Micro-6.0-874=1

## Package List:

  * SUSE Linux Micro 6.0 (aarch64 s390x x86_64)
    * libvirt-daemon-plugin-lockd-debuginfo-10.0.0-5.1
    * libvirt-daemon-proxy-debuginfo-10.0.0-5.1
    * libvirt-daemon-10.0.0-5.1
    * libvirt-daemon-config-network-10.0.0-5.1
    * libvirt-daemon-driver-nodedev-10.0.0-5.1
    * libvirt-client-qemu-10.0.0-5.1
    * libvirt-daemon-qemu-10.0.0-5.1
    * libvirt-daemon-log-10.0.0-5.1
    * libvirt-daemon-driver-storage-core-10.0.0-5.1
    * libvirt-daemon-driver-nwfilter-debuginfo-10.0.0-5.1
    * libvirt-daemon-driver-storage-mpath-debuginfo-10.0.0-5.1
    * libvirt-daemon-driver-secret-10.0.0-5.1
    * libvirt-daemon-log-debuginfo-10.0.0-5.1
    * libvirt-daemon-debuginfo-10.0.0-5.1
    * libvirt-daemon-driver-storage-mpath-10.0.0-5.1
    * libvirt-daemon-common-debuginfo-10.0.0-5.1
    * libvirt-daemon-driver-network-debuginfo-10.0.0-5.1
    * libvirt-daemon-driver-storage-scsi-debuginfo-10.0.0-5.1
    * libvirt-daemon-driver-storage-disk-10.0.0-5.1
    * libvirt-client-debuginfo-10.0.0-5.1
    * libvirt-daemon-driver-nwfilter-10.0.0-5.1
    * libvirt-nss-debuginfo-10.0.0-5.1
    * libvirt-daemon-driver-nodedev-debuginfo-10.0.0-5.1
    * libvirt-daemon-hooks-10.0.0-5.1
    * libvirt-daemon-driver-storage-iscsi-direct-10.0.0-5.1
    * libvirt-daemon-driver-storage-logical-debuginfo-10.0.0-5.1
    * libvirt-daemon-driver-storage-10.0.0-5.1
    * libvirt-daemon-plugin-lockd-10.0.0-5.1
    * libvirt-nss-10.0.0-5.1
    * libvirt-daemon-driver-storage-logical-10.0.0-5.1
    * libvirt-daemon-driver-storage-iscsi-direct-debuginfo-10.0.0-5.1
    * libvirt-libs-10.0.0-5.1
    * libvirt-daemon-driver-qemu-10.0.0-5.1
    * libvirt-daemon-driver-storage-core-debuginfo-10.0.0-5.1
    * libvirt-daemon-driver-storage-iscsi-debuginfo-10.0.0-5.1
    * libvirt-daemon-lock-10.0.0-5.1
    * libvirt-daemon-common-10.0.0-5.1
    * libvirt-debugsource-10.0.0-5.1
    * libvirt-daemon-driver-storage-scsi-10.0.0-5.1
    * libvirt-client-10.0.0-5.1
    * libvirt-daemon-driver-qemu-debuginfo-10.0.0-5.1
    * libvirt-daemon-driver-storage-iscsi-10.0.0-5.1
    * libvirt-daemon-driver-network-10.0.0-5.1
    * libvirt-libs-debuginfo-10.0.0-5.1
    * libvirt-daemon-lock-debuginfo-10.0.0-5.1
    * libvirt-daemon-driver-storage-disk-debuginfo-10.0.0-5.1
    * libvirt-daemon-driver-secret-debuginfo-10.0.0-5.1
    * libvirt-daemon-proxy-10.0.0-5.1
  * SUSE Linux Micro 6.0 (aarch64 x86_64)
    * libvirt-daemon-driver-storage-rbd-debuginfo-10.0.0-5.1
    * libvirt-daemon-driver-storage-rbd-10.0.0-5.1

## 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=1258345
  * 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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