[kdbg]

Rust uses a different allocator actually, jemalloc which doesnt store data inline like ptmalloc does. So an overflow could overwrite other heap stored data it wouldn't overwrite heap metadata or result in a vulnerability from the allocator code.

Granted, if you link/call in code that uses ptmalloc (glibc's malloc) in Rust it is still an issue but unsafe code in Rust itself won't be vulnerable to this sort of attack.