{"id":"CVE-2026-111123","revision":"fb5a513242a445ef937f4c127cd4704b","records":[{"revision":"fb5a513242a445ef937f4c127cd4704b","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-111123","aliases":[],"title":"FluidSynth through 2.6.1 Out-of-Bounds Write via SoundFont Modulator Destination","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.","state":0,"publishedAt":"2026-10-15T18:57:20.663+00:00","modifiedAt":"2026-10-15T19:46:31.057+00:00","affected":[{"ecosystem":"https://github.com","name":"fluidsynth","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"FluidSynth\",\n                    \"product\": \"fluidsynth\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"lessThanOrEqual\": \"2.6.1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"collectionURL\": \"https://github.com\",\n                    \"packageURL\": \"pkg:github/FluidSynth/fluidsynth\",\n                    \"repo\": \"https://github.com/FluidSynth/fluidsynth\"\n                }"}],"metrics":[{"system":"CVSS 4.0","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","score":6.9,"severity":"MEDIUM"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H","score":6.1,"severity":"MEDIUM"}],"references":["https://hackmd.io/@haind-pwn/fluidsynth-sf2-modulator-dest-generator-oob-write","https://github.com/FluidSynth/fluidsynth/blob/71e85b2ca6bf48641ba7e2261d8f2640ae473773/src/synth/fluid_voice.c#L615-L623","https://github.com/FluidSynth/fluidsynth/blob/71e85b2ca6bf48641ba7e2261d8f2640ae473773/src/synth/fluid_voice.c#L1184-L1229","https://github.com/FluidSynth/fluidsynth/blob/71e85b2ca6bf48641ba7e2261d8f2640ae473773/src/sfloader/fluid_defsfont.c#L1609-L1611","https://github.com/FluidSynth/fluidsynth","https://www.vulncheck.com/advisories/fluidsynth-through-2.6.1-out-of-bounds-write-via-soundfont-modulator-destination"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-111123","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-111123","identifiers":["CVE-2026-111123"]},"retained":false,"historicalAffected":[]}],"coverage":[]}