FluidSynth through 2.6.1 contains an out-of-bounds write vulnerability that allows attackers to corrupt heap and stack memory by supplying unvalidated SoundFont modulator destination values. Attackers can craft an SF2 file with PMOD/IMOD destinations of 63 to 255 that, when loaded and played, write past the voice generator array and updated_gen_bit, causing memory corruption and crashes.
Advisories

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Fixes

Solution

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Workaround

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History

Thu, 15 Oct 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 15 Oct 2026 19:00:00 +0000

Type Values Removed Values Added
Description FluidSynth through 2.6.1 contains an out-of-bounds write vulnerability that allows attackers to corrupt heap and stack memory by supplying unvalidated SoundFont modulator destination values. Attackers can craft an SF2 file with PMOD/IMOD destinations of 63 to 255 that, when loaded and played, write past the voice generator array and updated_gen_bit, causing memory corruption and crashes.
Title FluidSynth through 2.6.1 Out-of-Bounds Write via SoundFont Modulator Destination
First Time appeared Fluidsynth
Fluidsynth fluidsynth
Weaknesses CWE-787
CPEs cpe:2.3:a:fluidsynth:fluidsynth:*:*:*:*:*:*:*:*
Vendors & Products Fluidsynth
Fluidsynth fluidsynth
References
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-15T19:46:31.057Z

Reserved: 2026-10-15T17:03:42.957Z

Link: CVE-2026-111123

cve-icon Vulnrichment

Updated: 2026-10-15T19:46:25.022Z

cve-icon NVD

Status : Deferred

Published: 2026-10-15T19:17:25.460

Modified: 2026-10-15T20:17:09.930

Link: CVE-2026-111123

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses