No VulnCrest analysis published for this CVE yet. Below is the original CNA/NVD description, unmodified.
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.
Exploits & detection
No public PoC or detection template found yet.
Timeline
- Published: 04 Nov 2026
- Last modified upstream: 04 Nov 2026
Sources & licenses
- CVE / CVSS / CWE
- NVD record ↗ (unmodified). This product uses the NVD API but is not endorsed or certified by the NVD. CVE® © The MITRE Corporation.
- Exploitation
- CISA KEV (CC0) · EPSS by FIRST.org
- References used for the analysis
- https://github.com/munt/munt/blob/libmt32emu_2_8_3/mt32emu/src/MidiStreamParser.cpp#L223-L257
- https://github.com/munt/munt/commit/1749f7fed5cdb3a9015acce076a1512b1615dc3b
- https://github.com/munt/munt/issues/149
- 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
- Analysis, summary and remediation
- © VulnCrest