Main Vulnerability Database Vulnerabilities #VU137939

Race condition in Microsoft Windows and Windows Server - CVE-2026-54112

Published: July 17, 2026

Vulnerability identifier: #VU137939

CSH Severity: Low

CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-54112

CWE-ID: CWE-362

Exploitation vector: Local access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to elevate privileges.

The vulnerability exists due to concurrent execution using shared resource with improper synchronization ('race condition') in Windows Win32K when handling concurrent operations on shared resources. A local user can trigger a race condition to elevate privileges.

Affected software

Microsoft Windows
Windows Server

How to mitigate CVE-2026-54112

Install security update from vendor's website.

Microsoft Windows - addressed in versions 10 21H2 10.0.19044.7548, 10 22H2 10.0.19045.7548, 10 1809 10.0.17763.9020, 11 24H2 10.0.26100.8875, 11 25H2 10.0.26200.8875, 11 26H1 10.0.28000.2525
Windows Server - addressed in versions 2012 R2 6.3.9600.23291, 2019 10.0.17763.9020, 2022 10.0.20348.5386, 2025 10.0.26100.33158

External References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2026-54112

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