libmodplug through 0.8.9.1 contains a heap-based out-of-bounds write in CSoundFile::ReadDSM() in src/loaddsm.cpp because nPat is never checked against MAXPATTERNS. Attackers can supply a crafted DSM file with over 240 PATT chunks or a wrapping pattlen value to corrupt heap memory and crash the consuming process.

libmodplug through 0.8.9.1 contains a heap-based out-of-bounds read vulnerability in CSoundFile::ReadAMS2() in src/loadams.cpp that allows attackers to read adjacent heap memory via crafted AMS files. Attackers can supply an AMS module whose pattern effect bytes keep bit 7 set, driving the decoder past the input buffer and crashing any libmodplug consumer.