DEBIAN-CVE-2026-61714

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Source
https://security-tracker.debian.org/tracker/CVE-2026-61714
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-61714.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-61714
Upstream
Published
2026-09-18T20:17:18Z
Modified
2026-09-19T05:00:10Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

FluidSynth is a software synthesizer based on the SoundFont 2 specifications. From 2.2.4 until 2.5.6, configuring synth.midi-channels above 16 allows the MIDI player to index _fluid_player_t::channel_isplaying outside its fixed-size heap allocation while tracking active channels. The resulting out-of-bounds reads and writes invoke undefined behavior and may compromise confidentiality, integrity, or availability. No crafted MIDI file is required because the unsafe condition is created by the channel-count configuration itself. Keeping synth.midi-channels at its default value of 16 avoids the vulnerable path. This issue is fixed in version 2.5.6.

References

Affected packages

Debian:12 / fluidsynth

Package

Name
fluidsynth
Purl
pkg:deb/debian/fluidsynth?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2.*
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~hurd.1
2.4.0-1~hurd.2
2.4.0-1
2.4.2-1
2.4.3-1
2.4.3+dfsg-1
2.4.3+dfsg-2
2.4.3+dfsg-3
2.4.3+dfsg-4
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

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-61714.json"

Debian:13 / fluidsynth

Package

Name
fluidsynth
Purl
pkg:deb/debian/fluidsynth?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.4.4+dfsg-1+deb13u3

Affected versions

2.*
2.4.4+dfsg-1
2.4.4+dfsg-1+deb13u1
2.4.4+dfsg-1+deb13u2

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-61714.json"

Debian:14 / fluidsynth

Package

Name
fluidsynth
Purl
pkg:deb/debian/fluidsynth?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.5.6+dfsg-1

Affected versions

2.*
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

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-61714.json"