win32k Clipboard Bitmap - Use-After-Free

Source: https://code.google.com/p/google-security-research/issues/detail?id=533

This PoC triggers a crash on Windows 7 32-bit with Special Pool enabled on win32k.sys. The kernel crashes due to a use-after-free condition with bitmaps in the clipboard.
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Note that multiple PoC executions and simulated system activity may be required to trigger this issue.


Proof of Concept:
https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/39027.zip