GHSA-JC7W-C686-C4V9 github.com/ulikunitz/xz leaks memory when decoding a corrupted multiple LZMA archives

Summary It is possible to put data in front of an LZMA-encoded byte stream without detecting the situation while reading the header. This can lead to increased memory consumption because the current implementation allocates the full decoding buffer directly after reading the header. The LZMA head...