UBUNTU-CVE-2026-61714

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Source
https://ubuntu.com/security/CVE-2026-61714
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-61714.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-61714
Upstream
Downstream
Related
Published
2026-09-18T20:17:00Z
Modified
2026-10-06T23:31:55Z
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
  • Ubuntu - medium
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

Ubuntu:Pro:22.04:LTS / fluidsynth

Package

Name
fluidsynth
Purl
pkg:deb/ubuntu/fluidsynth?arch=source&distro=esm-apps%2Fjammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.2.5-1ubuntu0.1~esm1

Affected versions

2.*
2.1.7-1.1
2.2.4-2
2.2.5-1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "fluidsynth",
            "binary_version": "2.2.5-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "libfluidsynth3",
            "binary_version": "2.2.5-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-61714.json"

Ubuntu:Pro:24.04:LTS / fluidsynth

Package

Name
fluidsynth
Purl
pkg:deb/ubuntu/fluidsynth?arch=source&distro=esm-apps%2Fnoble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.3.4-1ubuntu0.1~esm1

Affected versions

2.*
2.3.3-2.1
2.3.4-1
2.3.4-1build1
2.3.4-1build2
2.3.4-1build3

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "fluidsynth",
            "binary_version": "2.3.4-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "libfluidsynth3",
            "binary_version": "2.3.4-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-61714.json"

Ubuntu:Pro:26.04:LTS / fluidsynth

Package

Name
fluidsynth
Purl
pkg:deb/ubuntu/fluidsynth?arch=source&distro=esm-apps%2Fresolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.4.8+dfsg-1ubuntu0.1~esm1

Affected versions

2.*
2.4.7+dfsg-2
2.4.8+dfsg-1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "fluidsynth",
            "binary_version": "2.4.8+dfsg-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "libfluidsynth3",
            "binary_version": "2.4.8+dfsg-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-61714.json"