CVE-2025-12748
Libvirt: denial of service in xml parsing
- State
- Published
- Severity
- 5.5 Medium
- Published
- Nov 11, 2025
- Updated
- Jun 29, 2026
- Reserved
- Nov 5, 2025
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.5 Medium | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | redhat |
Weaknesses
- CWE-770 Allocation of Resources Without Limits or Throttling
Affected Products
| Product | Versions |
|---|---|
libvirt |
|
Red Hat Enterprise Linux 10Red Hat |
|
Red Hat Enterprise Linux 9Red Hat |
|
Red Hat Enterprise Linux 6Red Hat | |
Red Hat Enterprise Linux 7Red Hat | |
Red Hat Enterprise Linux 8Red Hat |
References
- RHSA-2026:18326vendor-advisory
- RHSA-2026:18748vendor-advisory
- https://access.redhat.com/security/cve/CVE-2025-12748vdb-entry
- RHBZ#2413801issue-tracking
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