GHSA-qw3h-2hqv-29vqHighCVSS 7.8
libmt32emu before 2.8.4 contains a heap buffer overflow vulnerability in MidiStreamParserImpl:...
🔗 CVE IDs covered (1)
📋 Description
libmt32emu before 2.8.4 contains a heap buffer overflow vulnerability in MidiStreamParserImpl::parseSysex that allows attackers to write past a heap allocation by supplying oversized unterminated SysEx messages. Attackers can feed more than 32768 SysEx data bytes through the mt32emu_parse_stream API via MIDI files, ports, or sequencer clients to corrupt heap memory and crash the application.
🔗 References (8)
- https://nvd.nist.gov/vuln/detail/CVE-2026-121941
- https://github.com/munt/munt/issues/149
- https://github.com/munt/munt/commit/1749f7fed5cdb3a9015acce076a1512b1615dc3b
- https://github.com/munt/munt/blob/libmt32emu_2_8_3/mt32emu/src/MidiStreamParser.cpp#L223-L257
- https://hackmd.io/@haindpwn/munt-midistreamparser-oversized-sysex-heap-overflow
- https://www.vulncheck.com/advisories/libmt32emu-before-2.8.4-heap-buffer-overflow-via-midistreamparserimpl-parsesysex
- https://hackmd.io/@haindpwn/cve-2026-121941-munt-midistreamparser-oversized-sysex-heap-overflow
- https://github.com/advisories/GHSA-qw3h-2hqv-29vq