CVE-2026-111123
Medium
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.
SeverityMedium
CVSS6.1
Exploit probability—
ProductFluidsynth
PublishedOct 15, 2026
First seenOct 15, 2026
Weakness typeCWE-787Out-of-bounds write
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| FluidSynth fluidsynth | v ≤ 2.6.1 | — |
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