CVE-2026-44809

Published: Jun 9, 2026Modified: Jun 11, 2026

7.8

Vector

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

Exploitability: 1.8 / Impact: 5.9

Source: secure@microsoft.com

Description

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

Affected (7)

Products: Microsoft: Windows 11 24h2, Windows 11 25h2, Windows 11 26h1, Windows Server 2025

4 products

Windows 11 24h2

Windows 11 25h2

Windows 11 26h1

Windows Server 2025

Configuration A

7 vulnerable

Vulnerable Software	Affected Versions
Microsoft Windows 11 24h2	Before 10.0.26100.8655
Microsoft Windows 11 24h2	Before 10.0.26100.8655
Microsoft Windows 11 25h2	Before 10.0.26200.8655
Microsoft Windows 11 25h2	Before 10.0.26200.8655
Microsoft Windows 11 26h1	Before 10.0.28000.2269
Microsoft Windows 11 26h1	Before 10.0.28000.2269
Microsoft Windows Server 2025	Before 10.0.26100.32995

Related CWEs

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44809

Source: secure@microsoft.com

Vendor Advisory

Timeline

No history available yet.