CVE catalog
CVE-2026-111123
fluidsynth: CVE-2026-111123
- Severity
- Medium · CVSS 6.9
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 - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.19% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | fluidsynth | sid | 2.6.1+dfsg-2 | unknown |
| Debian | fluidsynth | forky | 2.6.1+dfsg-2 | unknown |
| Debian | fluidsynth | trixie | 2.4.4+dfsg-1+deb13u3 | unknown |
| Debian | fluidsynth | bookworm | 2.3.1-2 | unknown |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | fluidsynth | source | sid | (unfixed) | not yet assigned | Not reported | Not reported |
| Debian | fluidsynth | source | forky | (unfixed) | not yet assigned | Not reported | Not reported |
| Debian | fluidsynth | source | trixie | (unfixed) | not yet assigned | Not reported | Not reported |
| Debian | fluidsynth | source | bookworm | (unfixed) | not yet assigned | Not reported | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [fluidsynth]Affected
Details (2)
2.3.1-2· amd64 · bookwormAffected
dsa · fluidsynth · debian · bookworm
2.3.1-2· arm64 · bookwormAffected
dsa · fluidsynth · debian · bookworm
- [libfluidsynth3]Affected
Source package: [fluidsynth]
Details (2)
2.3.1-2· amd64 · bookwormAffected
dsa · fluidsynth · debian · bookworm
2.3.1-2· arm64 · bookwormAffected
dsa · fluidsynth · debian · bookworm
- [libfluidsynth-dev]Affected
Source package: [fluidsynth]
Details (2)
2.3.1-2· amd64 · bookwormAffected
dsa · fluidsynth · debian · bookworm
2.3.1-2· arm64 · bookwormAffected
dsa · fluidsynth · debian · bookworm
Observed:
References
- [https://nvd.nist.gov/vuln/detail/CVE-2026-111123]
- [https://osv.dev/vulnerability/CVE-2026-111123]
- [https://security-tracker.debian.org/tracker/CVE-2026-111123]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-111123.json]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]