May 2026: Windows Win32k Elevation of Privilege Vulnerability
CVE-2026-34347 Published on May 12, 2026
Windows Win32k Elevation of Privilege Vulnerability
Use after free in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally.
Weakness Type
What is a Dangling pointer Vulnerability?
Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.
CVE-2026-34347 has been classified to as a Dangling pointer vulnerability or weakness.
Products Associated with CVE-2026-34347
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Affected Versions
Microsoft Windows 10 Version 1607:- Version 10.0.14393.0 and below 10.0.14393.9140 is affected.
- Version 10.0.17763.0 and below 10.0.17763.8755 is affected.
- Version 10.0.19044.0 and below 10.0.19044.7291 is affected.
- Version 10.0.19045.0 and below 10.0.19045.7291 is affected.
- Version 10.0.22631.0 and below 10.0.22631.7079 is affected.
- Version 10.0.22631.0 and below 10.0.22631.7079 is affected.
- Version 10.0.26100.0 and below 10.0.26100.8457 is affected.
- Version 10.0.26200.0 and below 10.0.26200.8457 is affected.
- Version 10.0.28000.0 and below 10.0.28000.2113 is affected.
- Version 6.2.9200.0 and below 6.2.9200.26079 is affected.
- Version 6.2.9200.0 and below 6.2.9200.26079 is affected.
- Version 6.3.9600.0 and below 6.3.9600.23181 is affected.
- Version 6.3.9600.0 and below 6.3.9600.23181 is affected.
- Version 10.0.14393.0 and below 10.0.14393.9140 is affected.
- Version 10.0.14393.0 and below 10.0.14393.9140 is affected.
- Version 10.0.17763.0 and below 10.0.17763.8755 is affected.
- Version 10.0.17763.0 and below 10.0.17763.8755 is affected.
- Version 10.0.20348.0 and below 10.0.20348.5139 is affected.
- Version 10.0.25398.0 and below 10.0.25398.2330 is affected.
- Version 10.0.26100.0 and below 10.0.26100.32860 is affected.
- Version 10.0.26100.0 and below 10.0.26100.32860 is affected.