CVE-2025-62470

HIGH

Windows Common Log File System Driver - Authenticated Heap-based Buffer Overflow

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2025-62470. PoCs published by 96613686.

AI-analyzed exploit summary This PoC demonstrates a denial-of-service (DoS) vulnerability in the Windows Common Log File System (CLFS) driver by triggering a page fault in `CLFS!ClfsEncodeBlock`. The exploit manipulates log file structures to cause an invalid memory access, leading to a system crash (BUGCHECK_CODE: 50).

Description

Heap-based buffer overflow in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.

Exploits (1)

nomisec WORKING POC
by 96613686 · poc
https://github.com/96613686/CVE-2025-62470

This PoC demonstrates a denial-of-service (DoS) vulnerability in the Windows Common Log File System (CLFS) driver by triggering a page fault in `CLFS!ClfsEncodeBlock`. The exploit manipulates log file structures to cause an invalid memory access, leading to a system crash (BUGCHECK_CODE: 50).

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Moderate
Reliability
Reliable
Target: Windows 10 (10.0.26100.1) CLFS.SYS
No auth needed
Prerequisites: Access to create and manipulate log files via `CreateLogFile` and `DeviceIoControl`
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (1)

Core 1
Core References

Scores

CVSS v3 7.8
EPSS 0.0046
EPSS Percentile 36.3%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-122
Status published
Products (40)
Microsoft/Windows 10 Version 1607 10.0.14393.0 - 10.0.14393.8688
Microsoft/Windows 10 Version 1809 10.0.17763.0 - 10.0.17763.8146
Microsoft/Windows 10 Version 21H2 10.0.19044.0 - 10.0.19044.6691
Microsoft/Windows 10 Version 22H2 10.0.19045.0 - 10.0.19045.6691
Microsoft/Windows 11 version 22H3 10.0.22631.0 - 10.0.22631.6345
Microsoft/Windows 11 Version 23H2 10.0.22631.0 - 10.0.22631.6345
Microsoft/Windows 11 Version 24H2 10.0.26100.0 - 10.0.26100.7462
Microsoft/Windows 11 Version 25H2 10.0.26200.0 - 10.0.26200.7462
Microsoft/Windows Server 2008 R2 Service Pack 1 6.1.7601.0 - 6.1.7601.28064
Microsoft/Windows Server 2008 R2 Service Pack 1 (Server Core installation) 6.1.7601.0 - 6.1.7601.28064
... and 30 more
Published Dec 09, 2025
Tracked Since Feb 18, 2026