Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=747 The attached PoC crashes 32-bit Windows 7 with special pool enabled on win32k.sys. It might take several runs in order to reproduce. Tested the PoC on a single core VM. Proof of Concept: https://github.com/offensive-security/exploit-database-bin-sploits/raw/master/bin-sploits/39960.zip