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[ CVE-2025-29824 · Published 8 Apr 2025 ]

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

Exploited · CISA KEV CVSS 7.8 EPSS 14%No fix listed yet

[ Why it matters ]Priority signals

  • Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2025-04-08
  • Known to be used in ransomware campaigns
  • EPSS: 14% chance of exploitation in the next 30 days (higher than 97% of CVEs)

[ Description ]Official description

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

CISA: Microsoft Windows Common Log File System (CLFS) Driver contains a use-after-free vulnerability that allows an authorized attacker to elevate privileges locally.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 29 Apr 2025): Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References