CVE-2026-111123
MEDIUM
CVSS 6.1
Published: 2026-10-15
Modified: 2026-10-15
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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.
Quick Facts
| CVE ID | CVE-2026-111123 |
| CVSS Score | 6.1 |
| Vector | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H |
| Published | 2026-10-15 |
| Exploited | No |
| CISA KEV | No |
| PoC | Not public |
References
- https://github.com/FluidSynth/fluidsynth
- https://github.com/FluidSynth/fluidsynth/blob/71e85b2ca6bf48…
- https://github.com/FluidSynth/fluidsynth/blob/71e85b2ca6bf48…
- https://github.com/FluidSynth/fluidsynth/blob/71e85b2ca6bf48…
- https://hackmd.io/@haind-pwn/fluidsynth-sf2-modulator-dest-g…
- https://www.vulncheck.com/advisories/fluidsynth-through-2.6.…
- https://hackmd.io/@haind-pwn/fluidsynth-sf2-modulator-dest-g…