Description
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.
Problem types
Allocation of Resources Without Limits or Throttling
Product status
Any version
Timeline
| 2025-11-10: | Reported to Red Hat. |
| 2025-11-07: | Made public. |
Credits
Red Hat would like to thank Artem Mukhin and Святослав Терешин for reporting this issue.
References
access.redhat.com/security/cve/CVE-2025-12748
bugzilla.redhat.com/show_bug.cgi?id=2413801 (RHBZ#2413801)
