CVE-2026-54107

When ValidateHwnd Isn't a Gate: Root-Causing CVE-2026-54107 A use-after-free in win32kfull.sys window lifecycle management — how I found it, how I convinced myself it was real, and what the MSRC process actually looked like from the researcher's side. It was close to 2 AM when the target VM stopp...

Exploit for Race Condition in Microsoft

When ValidateHwnd Isn't a Gate: Root-Causing CVE-2026-54107...