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

Critical Threat Advisory: This vulnerability is documented in active Ransomware campaigns. Immediate remediation required.

Technical Severity

CVSS v3.1 Metrics

HIGH

7.8 / 10

Minimal Risk Critical

Vector Specification

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C

Exploitation Likelihood

EPSS Prediction

0.83 %

Predictive Probability

Percentile Rank

74.1 th

Documented as more likely to be exploited than 74.1% of known CVEs.

Detection Date

Apr 08, 2025

Remediation Due

Apr 29, 2025

CISA Catalog Active

Threat Analysis

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

Remediation Directive

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

Asset Context

Vendor Identity

Microsoft

Affected Product

Windows

Ransomware Status

Campaign Use Known

Weakness Classification

CWE-416

External Intelligence

https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-29824

NVD

National Vulnerability Database

https://nvd.nist.gov/vuln/detail/CVE-2025-29824