CVE-2026-111123
mediumFluidSynth through 2.6.1 contains an out-of-bounds write vulnerability that allows attackers to corrupt heap and stack memory by supplying unvalidated SoundFon…
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.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/FluidSynth/fluidsynth disclosure@vulncheck.com
- https://github.com/FluidSynth/fluidsynth/blob/71e85b2ca6bf48641ba7e2261d8f2640ae473773/src... disclosure@vulncheck.com
- https://github.com/FluidSynth/fluidsynth/blob/71e85b2ca6bf48641ba7e2261d8f2640ae473773/src... disclosure@vulncheck.com
- https://github.com/FluidSynth/fluidsynth/blob/71e85b2ca6bf48641ba7e2261d8f2640ae473773/src... disclosure@vulncheck.com
- https://hackmd.io/@haind-pwn/fluidsynth-sf2-modulator-dest-generator-oob-write disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/fluidsynth-through-2.6.1-out-of-bounds-write-via-soun... disclosure@vulncheck.com
- https://hackmd.io/@haind-pwn/fluidsynth-sf2-modulator-dest-generator-oob-write 134c704f-9b21-4f2e-91b3-4a467353bcc0