OSV-2023-937 Heap-buffer-overflow in pack_unpack

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=62822 Crash type: Heap-buffer-overflow READ 1 Crash state: packunpack mrbpackunpack mrbvmexec...

OSV-2022-1161 UNKNOWN READ in pack_unpack

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=53161 Crash type: UNKNOWN READ Crash state: packunpack mrbpackunpack mrbvmexec...