CVE-2025-59730 Heap-buffer-overflow write in FFmpeg SANM decoding due to lack of bounds-checking in old_codec48

When decoding a frame for a SANM file ANIM v0 variant, the decoded data can be larger than the buffer allocated for it. Frames encoded with codec 48 can specify their resolution width x height. A buffer of appropriate size is allocated depending on the resolution. This codec can encode the frame...