Microsoft Windows Common Log File System (CLFS) Driver Use-After-Free Vulnerability (CVE-2025-29824)
Severity: high · Patch status: unknown · Since 2025-04-08 · CVE-2025-29824
Microsoft Windows Common Log File System (CLFS) Driver contains a use-after-free vulnerability that allows an authorized attacker to elevate privileges locally. CISA added CVE-2025-29824 to its Known Exploited Vulnerabilities catalog on Apr 8, 2025, which means attackers are exploiting it in the wild. CISA reports known use in ransomware campaigns.
What to do
- Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- US federal agencies must remediate by Apr 29, 2025 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch