CVE-2025-29824

HIGH7.8

CISA KEV

Published 2025-04-08 · Updated 2026-06-17 · Source secure@microsoft.com

Summary

CVE-2025-29824 is a high-severity (CVSS 7.8) vulnerability in Microsoft Windows. CISA added it to the Known Exploited Vulnerabilities catalog on April 8, 2025, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by April 29, 2025. CISA also lists it as known to be used in ransomware campaigns, so it should be prioritised accordingly. Microsoft has 390 vulnerabilities in the KEV catalog, 117 of them linked to ransomware.

All 390 known-exploited Microsoft vulnerabilities →

Description

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

CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE-416

CISA Known-Exploited Vulnerability

Product: Microsoft — Windows

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

Date added: 2025-04-08 · Due: 2025-04-29

USED IN RANSOMWARE

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.

References

View on NVD

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