Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=793

There is a heap overflow in ATF impage packing. To reproduce the issue, load the attach file '129' using LoadImage.swf as follows:

LoadImage.swf?img=129


Proof of Concept:
https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/40090.zip