What’s Vulnerable › Vulnerabilities

CVE-2025-29824: Microsoft Windows Common Log File System (CLFS) Driver Use-After-Free Vulnerability

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2025-04-08
• EPSS: 19.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-04-08 · updated 2026-06-17
• Weakness: CWE-416

Description

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

Affected products

• Microsoft Windows 10 Version 1507: before 10.0.10240.20978 — fixed in 10.0.10240.20978
• Microsoft Windows 10 1607: before 10.0.14393.7969 — fixed in 10.0.14393.7969
• Microsoft Windows 10: before 10.0.17763.7136 — fixed in 10.0.17763.7136
• Microsoft Windows 10: before 10.0.19044.5737 — fixed in 10.0.19044.5737
• Microsoft Windows 10: before 10.0.19045.5737 — fixed in 10.0.19045.5737
• Microsoft Windows 11: before 10.0.22621.5189 — fixed in 10.0.22621.5189
• Microsoft Windows 11: before 10.0.22631.5189 — fixed in 10.0.22631.5189
• Microsoft Windows 11: before 10.0.26100.3775 — fixed in 10.0.26100.3775
• Microsoft Windows Server 2008: r2-sp1
• Microsoft Windows Server 2012: r2
• Microsoft Windows Server 2016: before 10.0.14393.7969 — fixed in 10.0.14393.7969
• Microsoft Windows Server 2019: before 10.0.17763.7136 — fixed in 10.0.17763.7136
• Microsoft Windows Server 2022: before 10.0.20348.3453 — fixed in 10.0.20348.3453
• Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): before 10.0.25398.1551 — fixed in 10.0.25398.1551
• Microsoft Windows Server 2025: before 10.0.26100.3775 — fixed in 10.0.26100.3775

How to fix

Upgrade to a fixed version: Microsoft Windows 10 Version 1507 10.0.10240.20978; Microsoft Windows 10 1607 10.0.14393.7969; Microsoft Windows 10 10.0.17763.7136; Microsoft Windows 10 10.0.19044.5737; Microsoft Windows 10 10.0.19045.5737; Microsoft Windows 11 10.0.22621.5189; Microsoft Windows 11 10.0.22631.5189; Microsoft Windows 11 10.0.26100.3775; Microsoft Windows Server 2016 10.0.14393.7969; Microsoft Windows Server 2019 10.0.17763.7136; Microsoft Windows Server 2022 10.0.20348.3453; Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.1551. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-29824
• https://www.vicarius.io/vsociety/posts/cve-2025-29824-windows-common-log-file-system-driver-elevation-of-privilege-vulnerability-detection-script
• https://www.vicarius.io/vsociety/posts/cve-2025-29824-windows-common-log-file-system-driver-elevation-of-privilege-vulnerability-mitigation-script
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-29824

Get alerted when CVE-2025-29824 or the next vulnerability affects your stack