Internet Bug Bounty: Heap overflow in utf32be_mbc_to_code

https://bugs.php.net/bug.php?id=77418 Buffer overflow in mbctocode functions for UTF32BE, UTF32LE, UTF16BE, and UTF16LE due to incorrect length assumptions of a buffer. Provided a patch that was adapted to check the length of the buffer prior to using it. Impact Memory leakage and/or corruption...