I would imagine that the scenario is simply reuse of some buffer without clearing it, maybe in an attempt to save on allocations. It can happen across so many (

I would imagine that the scenario is simply reuse of some buffer without clearing it, maybe in an attempt to save on allocations. It can happen across so many (even safe) languages. It doesn't matter what guarantees you have around uninitialised memory if you're reusing an initialised buffer yourself.