smpeg through 2.0.0 contains an integer underflow vulnerability in streamheader() in MPEGsystem.cpp that allows attackers to wrap packetsize by declaring an undersized packet length. Attackers can supply a crafted MPEG file opened via SMPEGnew, SMPEGnewrwops or SMPEGnewdata to trigger a reachable assertion or out-of-bounds copy, crashing the application.

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 SMPEGnew, SMPEGnewrwops, or SMPEGnewdata.