Source: libmodplug Version: 1:0.8.9.0-3 Severity: important Tags: security upstream Forwarded: https://github.com/Konstanty/libmodplug/issues/103 X-Debbugs-Cc: [email protected], Debian Security Team <[email protected]>
Hi, The following vulnerability was published for libmodplug. CVE-2026-75904[0]: | 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. If you fix the vulnerability please also make sure to include the CVE (Common Vulnerabilities & Exposures) id in your changelog entry. For further information see: [0] https://security-tracker.debian.org/tracker/CVE-2026-75904 https://www.cve.org/CVERecord?id=CVE-2026-75904 [1] https://github.com/Konstanty/libmodplug/issues/103 Regards, Salvatore
