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Vulnerabilities

Vulnerability · CVE-2025-12748

A flaw was discovered in libvirt in the XML file processing.

Published Nov 11, 2025 · catalog updated Oct 18, 2026 · Red Hat Red Hat Enterprise Linux 9

Check if you run it

No confirmed exploitation is on record for CVE-2025-12748. EPSS is 0.22%. Act only if a listed version of Red Hat Red Hat Enterprise Linux 9 is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.22%
Remediation
Advisory link
Affected products
vendor Red Hat Red Hat Enterprise Linux 9 patch: 0:11.10.0-12.el9_8

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Red Hat Red Hat Enterprise Linux 9 patch: 0:11.10.0-12.el9_8patch: 0:11.10.0-12.el9_8

How to fix CVE-2025-12748

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-12748. EPSS is 0.22%. Act only if a listed version of Red Hat Red Hat Enterprise Linux 9 is installed.

Which versions are affected?

Compare what you have installed with Red Hat Red Hat Enterprise Linux 9 patch: 0:11.10.0-12.el9_8 patch: 0:11.10.0-12.el9_8. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-770: Allocation of Resources Without Limits or Throttling. EPSS 0.22%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Nov 11, 2025 · NIST NVD

    Detected

    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

  2. Oct 18, 2026 · NIST NVD

    Updated

    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

Sources

  • CVE.orgVulnerability recordCVE-2025-12748

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-12748

    30-day exploitation probability 0.22%

    first.org
  • EUVDVulnerability recordEUVD-2025-99083

    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 libvir

    euvd.enisa.europa.eu
  • NIST NVDVulnerability recordCVE-2025-12748

    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 libvir

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 21, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.