OESA-2026-3604

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OESA-2026-3604

Summary: libmodplug security update

Details: The library which was part of the Modplug-xmms project. Security Fix(es): libmodplug through 0.8.9.1 contains an out-of-bounds read in pat_smplooped in src/load_pat.cpp. The function validates only the upper bound of its sample index against MAXSMP and then subtracts one before indexing the 191-byte static array pat_loops, so an index of zero reads pat_loops[-1], one byte before the array. The index is the smpno field of a parsed MIDI event, which is initialised to zero and only later overwritten from a program-change parameter, so an event reaching the note test before an instrument is assigned carries zero. A 32-byte MIDI file supplied to the library's public ModPlug_Load entry point drives the path through CSoundFile::Create, CSoundFile::ReadMID, and MID_ReadPatterns to the read. The byte read out of bounds determines whether a note event is treated as looping, so adjacent static storage influences playback state.(CVE-2026-75904)

References: https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3604, https://nvd.nist.gov/vuln/detail/CVE-2026-75904