{"id":"CVE-2026-111123","aliases":["DEBIAN-CVE-2026-111123","EUVD-2026-102354","GHSA-7hc9-ggv2-4w8c","UBUNTU-CVE-2026-111123"],"status":"published","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.","severity":{"version":"4.0","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","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00195,"percentile":0.09308,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-787"],"published":"2026-10-15T18:57:20Z","modified":"2026-10-28T17:50:35Z","affected":[{"source":"osv","ecosystem":"Debian:12","package":"fluidsynth","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.3.1-2","2.3.2-1","2.3.3-1","2.3.3-2","2.3.3-2.1","2.3.4-1","2.3.5-1","2.3.6-1","2.4.0-1","2.4.0-1~hurd.1","2.4.0-1~hurd.2","2.4.2-1","2.4.3+dfsg-1","2.4.3+dfsg-2","2.4.3+dfsg-3","2.4.3+dfsg-4","2.4.3-1","2.4.4+dfsg-1","2.4.6+dfsg-1","2.4.7+dfsg-1","2.4.7+dfsg-2","2.4.8+dfsg-1","2.5.0+dfsg-1","2.5.1+dfsg-1","2.5.1+dfsg-2","2.5.2+dfsg-1","2.5.3+dfsg-1","2.5.4+dfsg-1","2.5.5+dfsg-1","2.5.5+dfsg-2","2.5.6+dfsg-1","2.5.7+dfsg-1","2.6.0+dfsg-1","2.6.1+dfsg-1","2.6.1+dfsg-2"]},{"source":"osv","ecosystem":"Debian:13","package":"fluidsynth","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.4+dfsg-1","2.4.4+dfsg-1+deb13u1","2.4.4+dfsg-1+deb13u2","2.4.4+dfsg-1+deb13u3","2.4.6+dfsg-1","2.4.7+dfsg-1","2.4.7+dfsg-2","2.4.8+dfsg-1","2.5.0+dfsg-1","2.5.1+dfsg-1","2.5.1+dfsg-2","2.5.2+dfsg-1","2.5.3+dfsg-1","2.5.4+dfsg-1","2.5.5+dfsg-1","2.5.5+dfsg-2","2.5.6+dfsg-1","2.5.7+dfsg-1","2.6.0+dfsg-1","2.6.1+dfsg-1","2.6.1+dfsg-2"]},{"source":"osv","ecosystem":"Debian:14","package":"fluidsynth","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.4+dfsg-1","2.4.6+dfsg-1","2.4.7+dfsg-1","2.4.7+dfsg-2","2.4.8+dfsg-1","2.5.0+dfsg-1","2.5.1+dfsg-1","2.5.1+dfsg-2","2.5.2+dfsg-1","2.5.3+dfsg-1","2.5.4+dfsg-1","2.5.5+dfsg-1","2.5.5+dfsg-2","2.5.6+dfsg-1","2.5.7+dfsg-1","2.6.0+dfsg-1","2.6.1+dfsg-1","2.6.1+dfsg-2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:14.04:LTS","package":"fluidsynth","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.6-2","1.1.6-2ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"fluidsynth","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.6-2build1","1.1.6-3","1.1.6-3ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"fluidsynth","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.6-4","1.1.8-1","1.1.8-2","1.1.8-3","1.1.9-1","1.1.9-1ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"fluidsynth","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.11-4","1.1.11-4ubuntu1","2.1.0-1","2.1.1-2","2.1.1-2ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:22.04:LTS","package":"fluidsynth","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.7-1.1","2.2.4-2","2.2.5-1","2.2.5-1ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:24.04:LTS","package":"fluidsynth","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.3.3-2.1","2.3.4-1","2.3.4-1build1","2.3.4-1build2","2.3.4-1build3","2.3.4-1ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"fluidsynth","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.8+dfsg-1","2.5.6+dfsg-1","2.5.7+dfsg-1","2.6.0+dfsg-1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:26.04:LTS","package":"fluidsynth","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.7+dfsg-2","2.4.8+dfsg-1","2.4.8+dfsg-1ubuntu0.1~esm1"]}],"products":[{"vendor":"fluidsynth","product":"fluidsynth"}],"references":[{"url":"https://hackmd.io/@haind-pwn/fluidsynth-sf2-modulator-dest-generator-oob-write","tags":["technical-description","exploit","article","report"]},{"url":"https://github.com/FluidSynth/fluidsynth/blob/71e85b2ca6bf48641ba7e2261d8f2640ae473773/src/synth/fluid_voice.c#L615-L623","tags":["technical-description","article","report"]},{"url":"https://github.com/FluidSynth/fluidsynth/blob/71e85b2ca6bf48641ba7e2261d8f2640ae473773/src/synth/fluid_voice.c#L1184-L1229","tags":["technical-description","article","report"]},{"url":"https://github.com/FluidSynth/fluidsynth/blob/71e85b2ca6bf48641ba7e2261d8f2640ae473773/src/sfloader/fluid_defsfont.c#L1609-L1611","tags":["technical-description","article","report"]},{"url":"https://github.com/FluidSynth/fluidsynth","tags":["product","package","report"]},{"url":"https://www.vulncheck.com/advisories/fluidsynth-through-2.6.1-out-of-bounds-write-via-soundfont-modulator-destination","tags":["third-party-advisory","advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-111123","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-7hc9-ggv2-4w8c"},{"url":"https://github.com","tags":["web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111123.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-111123","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-111123","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-111123","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-111123","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.","status":"published","published":"2026-10-15T18:57:20.663Z","modified":"2026-10-15T19:46:31.057Z","cvss":[{"version":"4.0","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","level":"medium","assessor":"cna"},{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:20:15.712761Z"}],"euvd":[{"id":"EUVD-2026-102354","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.","status":"published","published":"2026-10-15T18:57:20Z","modified":"2026-10-15T19:46:31Z","cvss":[{"version":"4.0","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","level":"medium"}],"updated_at":"2026-11-02T17:00:10.305867Z"}],"ghsa":[{"id":"GHSA-7hc9-ggv2-4w8c","title":"FluidSynth through 2.6.1 contains an out-of-bounds write vulnerability that allows attackers to...","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.","status":"published","published":"2026-10-15T21:36:02Z","modified":"2026-10-15T21:36:11Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H","level":"medium"},{"version":"4.0","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T15:13:49.297576Z"}],"nvd":[{"id":"CVE-2026-111123","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.","status":"published","published":"2026-10-15T19:17:25.46Z","modified":"2026-10-15T20:17:09.93Z","cvss":[{"version":"4.0","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"},{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:12:59.751798Z"}],"osv":[{"id":"CVE-2026-111123","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.","status":"published","published":"2026-10-15T18:57:20.663Z","modified":"2026-10-28T02:31:03.134164482Z","cvss":[{"version":"4.0","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","level":"medium"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T15:44:55.61515Z"},{"id":"DEBIAN-CVE-2026-111123","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.","status":"published","published":"2026-10-15T19:17:25.46Z","modified":"2026-10-16T06:00:08.950749856Z","cvss":[{"version":"4.0","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"}],"updated_at":"2026-11-02T15:45:49.824149Z"},{"id":"UBUNTU-CVE-2026-111123","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.","status":"published","published":"2026-10-15T19:17:00Z","modified":"2026-10-28T17:50:35Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H","level":"medium"},{"version":"4.0","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","level":"medium"}],"updated_at":"2026-11-02T16:55:59.591851Z"}]}}