I've created a CPython umbrella issue for C bugs found with a new tool: https://github.com/python/cpython/issues/146102
The umbrella issue reported 47 bugs, 18 have been filed by various people, and 14 have been fixed. Each bug has an explanation about it linked in the issue.
That means you can join the fun: pick a bug, create an issue, and fix it in a PR!
There's also a different umbrella issue with more than a hundred (less detailed) bugs to pick from: https://github.com/python/cpython/issues/146103
Have fun!
