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Ubuntu Security Notice USN-7047-1
January 08, 2026

libvirt vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 25.10
- Ubuntu 25.04
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS

Summary:

Several security issues were fixed in libvirt.

Software Description:
- libvirt: Libvirt virtualization toolkit

Details:

It was discovered that libvirt parsed user-provided XML files before
performing ACL checks. An attacker could possibly use this issue to cause
libvirt to consume memory, resulting in a denial of service.
(CVE-2025-12748)

It was discovered that libvirt incorrectly handled permissions on external
inactive snapshots. A local attacker could possibly use this issue to
obtain sensitive guest contents. (CVE-2025-13193)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 25.10
  libvirt-daemon                  11.6.0-1ubuntu3.2
  libvirt-daemon-system           11.6.0-1ubuntu3.2
  libvirt0                        11.6.0-1ubuntu3.2

Ubuntu 25.04
  libvirt-daemon                  11.0.0-2ubuntu6.5
  libvirt-daemon-system           11.0.0-2ubuntu6.5
  libvirt0                        11.0.0-2ubuntu6.5

Ubuntu 24.04 LTS
  libvirt-daemon                  10.0.0-2ubuntu8.11
  libvirt-daemon-system           10.0.0-2ubuntu8.11
  libvirt0                        10.0.0-2ubuntu8.11

Ubuntu 22.04 LTS
  libvirt-daemon                  8.0.0-1ubuntu7.15
  libvirt-daemon-system           8.0.0-1ubuntu7.15
  libvirt0                        8.0.0-1ubuntu7.15

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-7047-1
  CVE-2025-12748, CVE-2025-13193

Package Information: