Allocation of Resources Without Limits or Throttling Affecting libvirt package, versions <11.6.0-1ubuntu3.2


Severity

Recommended
0.0
medium
0
10

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.21% (12th percentile)

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  • Snyk IDSNYK-UBUNTU2510-LIBVIRT-13882371
  • published9 Jan 2026
  • disclosed11 Nov 2025

Introduced: 11 Nov 2025

CVE-2025-12748  (opens in a new tab)
CWE-770  (opens in a new tab)

How to fix?

Upgrade Ubuntu:25.10 libvirt to version 11.6.0-1ubuntu3.2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libvirt package and not the libvirt package as distributed by Ubuntu. See How to fix? for Ubuntu:25.10 relevant fixed versions and status.

A flaw was discovered in libvirt in the XML file processing. More specifically, the parsing of user provided XML files was performed before the ACL checks. A malicious user with limited permissions could exploit this flaw by submitting a specially crafted XML file, causing libvirt to allocate too much memory on the host. The excessive memory consumption could lead to a libvirt process crash on the host, resulting in a denial-of-service condition.

CVSS Base Scores

version 3.1