Windows Common Log File System Driver Elevation of Privilege Vulnerability

cisa required action Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

1. 2025-04-08 0-day patched (Project Zero)
2. 2025-04-08 Added to CISA KEV
3. 2025-04-08 Published
4. 2025-04-08 CISA SSVC: exploitation active
5. 2025-04-29 CISA patch deadline

Added

19 mo ago (2025-04-08)

Patch by

2025-04-29 (18 mo ago)

Ransomware

Known to be used in ransomware campaigns

Required action

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Vendor, product

Microsoft, Windows

CISA name

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

Detected in real attacks while still unknown to the vendor and the public, per Google Project Zero's 0day In-the-Wild tracker.

Patched

2025-04-08

Details

project zero tracker

Groups reported to have exploited it in intrusions.

• RansomEXX ransomware gang

reported by microsoft.com

Ransomware Vulnerability Matrix by BushidoUK (github.com/BushidoUK/Ransomware-Vulnerability-Matrix), reformatted per CVE. CC BY 4.0

Exploitation

Active, exploited in the wild

Automatable

no

Technical impact

total

Assessed

19 mo ago (2025-04-08)

19.25% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).

• vicarius.io https://www.vicarius.io/vsociety/posts/cve-2025-29824-windows-common-log-file-system-driver-elevation-of-privilege-vulnerability-mitigation-script referenced PoC, tagged "exploit" by a source, unverified
• vicarius.io https://www.vicarius.io/vsociety/posts/cve-2025-29824-windows-common-log-file-system-driver-elevation-of-privilege-vulnerability-detection-script referenced PoC, tagged "exploit" by a source, unverified

• Microsoft Windows 10 Version 1507
• Microsoft Windows 10 Version 1607
• Microsoft Windows 10 Version 1809
• Microsoft Windows 10 Version 21H2
• Microsoft Windows 10 Version 22H2
• Microsoft Windows 11 version 22H2
• Microsoft Windows 11 version 22H3
• Microsoft Windows 11 Version 23H2
• Microsoft Windows 11 Version 24H2
• Microsoft Windows Server 2008 R2 Service Pack 1
• Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation)
• Microsoft Windows Server 2008 Service Pack 2
• Microsoft Windows Server 2008 Service Pack 2 (Server Core installation)
• Microsoft Windows Server 2012
• Microsoft Windows Server 2012 (Server Core installation)
• Microsoft Windows Server 2012 R2
• Microsoft Windows Server 2012 R2 (Server Core installation)
• Microsoft Windows Server 2016
• Microsoft Windows Server 2016 (Server Core installation)
• Microsoft Windows Server 2019
• Microsoft Windows Server 2019 (Server Core installation)
• Microsoft Windows Server 2022
• Microsoft Windows Server 2022, 23H2 Edition (Server Core installation)
• Microsoft Windows Server 2025
• Microsoft Windows Server 2025 (Server Core installation)

Weakness

• CWE-416 Use After Free

• msrc.microsoft.com /update-guide/vulnerability/CVE-2025-29824

  vendor-advisory, patch

• vicarius.io /vsociety/posts/cve-2025-29824-windows-common-log-file-system-driver-elevation-of-privilege-vulnerability-miti

  exploit, third-party-advisory

• vicarius.io /vsociety/posts/cve-2025-29824-windows-common-log-file-system-driver-elevation-of-privilege-vulnerability-dete

  exploit, third-party-advisory

• cisa.gov /known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-29824

  government-resource, us-government-resource

• CVE List CVE-2025-29824
• NVD CVE-2025-29824

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.