NULL-pointer dereference in `is_removable_media_path()`: when DevicePathToStr() returns `NULL` (e.g. on EFI pool-allocation failure), the result is passed directly to `StrnCaseCmp()`, which dereferences it on the first loop iteration and crashes. This is a 
robustness / defensive-hardening issue -- a missing NULL check on a boot-path helper, rather than an attacker-controlled memory-safety bug.