CVE-2026-61714 FluidSynth - Out of Bounds Read/Write

FluidSynth 2.2.4 to 2.5.6 contains an out-of-bounds read/write caused by configuring synth.midi-channels above 16 in _fluid_player_t::channel_isplaying, letting attackers cause undefined behavior affecting confidentiality, integrity, or availability, exploit requires setting midi-channels above 16.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.14% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Out of Bounds Read/Write
Impact
Information Disclosure, Data Tampering, Denial Of Service
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
18 September 2026
Updated
15 October 2026
Weakness
CWE-122

Vendor fix

Update to version 2.5.6 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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