CVE-2026-112009

Description

smpeg through 2.0.0 contains a heap out-of-bounds read vulnerability in MPEGsystem::FillBuffer() that allows attackers to read past the 16384-byte buffer by supplying a crafted system header stream table. Attackers can provide an MPEG file whose stream table bytes all set the high bit, which crashes applications opening it through SMPEG_new, SMPEG_new_rwops, or SMPEG_new_data.

References

• https://github.com/icculus/smpeg
• https://github.com/icculus/smpeg/blob/d188dc111f4817288718705e4a84e248803ccfdc/MPEGsystem.cpp#L803-L823
• https://hackmd.io/@haindpwn/smpeg-system-header-stream-table-oob-read
• https://www.vulncheck.com/advisories/smpeg-through-2.0.0-heap-out-of-bounds-read-via-mpegsystem-fillbuffer