Tiny no-libc ELF port / 801-byte build

[Crihexe]

Hi, I was a bit concerned about the fate of my ctf platform with RCE challenges, so I had fun making this super size-(sl)optimized Linux x86_64 no-libc ELF build of the original Python PoC for research/reproduction purposes after (hopefully) having patched it.

Repo: https://github.com/Crihexe/copy-fail-tiny-elf-CVE-2026-31431

I got GCC 13.3.0 on Ubuntu 24.04, and it builds an 801 bytes ELF :)

I think it might even be possible to shrink it further. It could probably be minified below then the original python version size of 732 bytes lol.

Happy to close this if you prefer not to track external ports here.

[tgies]

Thanks! Converted to discussion

[tgies]

Definitely stealing some ideas from you, thx again

[Crihexe]

Yoo check it out again then :)
Me and @drank40 managed to make a 492 bytes version of it