Apr 2026: Windows LUA File Virtualization Filter Driver Elevation of Privilege Vulnerability
CVE-2026-27929 Published on April 14, 2026
Windows LUA File Virtualization Filter Driver Elevation of Privilege Vulnerability
Time-of-check time-of-use (toctou) race condition in Windows LUAFV allows an authorized attacker to elevate privileges locally.
Weakness Type
What is a TOCTTOU Vulnerability?
The software checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. This can cause the software to perform invalid actions when the resource is in an unexpected state. This weakness can be security-relevant when an attacker can influence the state of the resource between check and use. This can happen with shared resources such as files, memory, or even variables in multithreaded programs.
CVE-2026-27929 has been classified to as a TOCTTOU vulnerability or weakness.
Products Associated with CVE-2026-27929
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Affected Versions
Microsoft Windows 10 Version 1607:- Version 10.0.14393.0 and below 10.0.14393.9060 is affected.
- Version 10.0.17763.0 and below 10.0.17763.8644 is affected.
- Version 10.0.19044.0 and below 10.0.19044.7184 is affected.
- Version 10.0.19045.0 and below 10.0.19045.7184 is affected.
- Version 10.0.22631.0 and below 10.0.22631.6936 is affected.
- Version 10.0.22631.0 and below 10.0.22631.6936 is affected.
- Version 10.0.26100.0 and below 10.0.26100.32690 is affected.
- Version 10.0.26200.0 and below 10.0.26200.8246 is affected.
- Version 10.0.28000.0 and below 10.0.28000.1836 is affected.
- Version 6.2.9200.0 and below 6.2.9200.26026 is affected.
- Version 6.2.9200.0 and below 6.2.9200.26026 is affected.
- Version 6.3.9600.0 and below 6.3.9600.23132 is affected.
- Version 6.3.9600.0 and below 6.3.9600.23132 is affected.
- Version 10.0.14393.0 and below 10.0.14393.9060 is affected.
- Version 10.0.14393.0 and below 10.0.14393.9060 is affected.
- Version 10.0.17763.0 and below 10.0.17763.8644 is affected.
- Version 10.0.17763.0 and below 10.0.17763.8644 is affected.
- Version 10.0.20348.0 and below 10.0.20348.5020 is affected.
- Version 10.0.25398.0 and below 10.0.25398.2274 is affected.
- Version 10.0.26100.0 and below 10.0.26100.32690 is affected.
- Version 10.0.26100.0 and below 10.0.26100.32690 is affected.