5.5

CVE-2025-12748: libvirt

CVSS: 5.5v3.1MediumDeferred
AliasesRHSA-2026:18326RHSA-2026:18748UBUNTU-CVE-2025-12748
Published 11-11-2025Last modified 29-06-2026
Open JSON

Vulnerability summary

CVE-2025-12748 is a medium (CVSS 5.5) vulnerability in libvirt. EPSS estimates a 0.22% chance of exploitation in the next 30 days, higher than 12.1% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.22%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 12 · Related 13
OPENSUSE-SU-2025:15746-1OPENSUSE-SU-2025:20100-1SUSE-SU-2025:21082-1SUSE-SU-2025:21150-1SUSE-SU-2026:0068-1SUSE-SU-2026:0079-1

Timeline

  1. 11-11-2025
    PublishedVulnerability first disclosed.
  2. 29-06-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.22%

Chance of exploitation in the next 30 days

Percentile

12%

Versus all other CVEs

30-day change

+0.02 pp

From 0.21% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.22%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Redhat59 products
  • libvirt< 0:11.10.0-12.el10_2 | < 0:11.10.0-12.el9_8
  • libvirt-client< 0:11.10.0-12.el10_2 | < 0:11.10.0-12.el9_8
  • libvirt-client-debuginfo< 0:11.10.0-12.el10_2 | < 0:11.10.0-12.el9_8
  • libvirt-client-qemu< 0:11.10.0-12.el10_2 | < 0:11.10.0-12.el9_8
  • libvirt-daemon< 0:11.10.0-12.el10_2 | < 0:11.10.0-12.el9_8
Debian1 product
  • libvirtAll versions (No fix recorded) | < 11.3.0-3+deb13u2 | < 11.10.0-1
Ubuntu1 product
  • libvirtAll versions (No fix recorded) | < 8.0.0-1ubuntu7.15 | < 10.0.0-2ubuntu8.11 | < 11.6.0-1ubuntu3.2 | < 11.6.0-1ubuntu7

3 vendors · 61 products

References

56 links
Show all 56 references