CVE-2026-61714 (GCVE-0-2026-61714)

Vulnerability from cvelistv5 – Published: 2026-09-18 20:01 – Updated: 2026-09-25 16:13
VLAI
Title
FluidSynth: Heap Buffer Overflow in MIDI Player
Summary
FluidSynth is a software synthesizer based on the SoundFont 2 specifications. From 2.2.4 until 2.5.6, configuring synth.midi-channels above 16 allows the MIDI player to index _fluid_player_t::channel_isplaying outside its fixed-size heap allocation while tracking active channels. The resulting out-of-bounds reads and writes invoke undefined behavior and may compromise confidentiality, integrity, or availability. No crafted MIDI file is required because the unsafe condition is created by the channel-count configuration itself. Keeping synth.midi-channels at its default value of 16 avoids the vulnerable path. This issue is fixed in version 2.5.6.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-25 16:12 UTC
CWE
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7687 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
FluidSynth fluidsynth Affected: >= 2.2.4, < 2.5.6
guessed Create a notification for this product.
Show details on NVD website
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