Microsoft Windows Common Log File System (CLFS) Driver Use-After-Free Vulnerability

HIGH 7.8EXPLOITED (CISA KEV)CVE-2025-29824 · Published 08/04/2025 · updated 17/06/2026

Microsoft Windows Common Log File System (CLFS) Driver Use-After-Free Vulnerability. Actively exploited: CISA added this vulnerability to its Known Exploited Vulnerabilities catalog on 08/04/2025. Patch affected systems as an emergency. It is known to be used in ransomware campaigns.

In short

CVE-2025-29824 is a HIGH (CVSS 7.8) vulnerability.
Exploited in the wild: CISA added it to the KEV catalog on 08/04/2025.
Chance of exploitation in the next 30 days (EPSS): 19.3%, higher than 97.3% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
Windows Microsoft	Versions not published yet (product named by CISA KEV)

Description

Use after free in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2025-29824 · Vendor Advisory
vicarius.io/vsociety/posts/cve-2025-29824-windows-common-log-file-system-driver-elevation-of-privilege-vulnerability-detection-script · Exploit
vicarius.io/vsociety/posts/cve-2025-29824-windows-common-log-file-system-driver-elevation-of-privilege-vulnerability-mitigation-script · Exploit
cisa.gov/known-exploited-vulnerabilities-catalog · US Government Resource
CISA KEV · CVE-2025-29824

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Package	Affected versions	Patched versions
Windows Microsoft	Versions not published yet (product named by CISA KEV)

Package

Affected versions

Patched versions

Windows

Microsoft

Versions not published yet (product named by CISA KEV)