`std::hash` collision to create relative read/write on heap which can be upgraded to arbitrary read/write. Full solve script and writeup [here](https://github.com/welchbj/ctf/tree/master/writeups/2021/TetCTF/cache_v1).

Original writeup (https://github.com/welchbj/ctf/tree/master/writeups/2021/TetCTF/cache_v1).