UBUNTU-CVE-2026-61722

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Source
https://ubuntu.com/security/CVE-2026-61722
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-61722.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-61722
Upstream
Published
2026-09-18T20:17:00Z
Modified
2026-10-06T23:31:58Z
Severity
  • 6.8 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

FluidSynth is a software synthesizer based on the SoundFont 2 specifications. From 2.5.0 until 2.5.6, the native DLS parser validates articulation chunks using the unsigned expression cbsize + connblocks * 12 without first ensuring that the multiplication and addition fit in 32 bits. A crafted DLS file can supply a large connblocks value that wraps the expression and bypasses the chunk-size check, after which the parser performs approximately one billion 12-byte iterations beyond the chunk boundary. The excessive processing and invalid reads can cause denial of service. Builds with the CMake option enable-native-dls set to OFF do not expose the parser. This issue is fixed in version 2.5.6.

References

Affected packages

Ubuntu:Pro:14.04:LTS
fluidsynth

Package

Name
fluidsynth
Purl
pkg:deb/ubuntu/fluidsynth?arch=source&distro=esm-infra-legacy%2Ftrusty

Affected ranges

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

Affected versions

1.*
1.1.6-2
1.1.6-2ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "fluidsynth",
            "binary_version":  "1.1.6-2ubuntu0.1~esm1"
        },
        {
            "binary_name":  "libfluidsynth1",
            "binary_version":  "1.1.6-2ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-61722.json"
Ubuntu:Pro:16.04:LTS
fluidsynth

Package

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

Affected ranges

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

Affected versions

1.*
1.1.6-2build1
1.1.6-3
1.1.6-3ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "fluidsynth",
            "binary_version":  "1.1.6-3ubuntu0.1~esm1"
        },
        {
            "binary_name":  "libfluidsynth1",
            "binary_version":  "1.1.6-3ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-61722.json"
Ubuntu:Pro:18.04:LTS
fluidsynth

Package

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

Affected ranges

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

Affected versions

1.*
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

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "fluidsynth",
            "binary_version":  "1.1.9-1ubuntu0.1~esm1"
        },
        {
            "binary_name":  "libfluidsynth1",
            "binary_version":  "1.1.9-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-61722.json"
Ubuntu:Pro:20.04:LTS
fluidsynth

Package

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

Affected ranges

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

Affected versions

1.*
1.1.11-4
1.1.11-4ubuntu1
2.*
2.1.0-1
2.1.1-2
2.1.1-2ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "fluidsynth",
            "binary_version":  "2.1.1-2ubuntu0.1~esm1"
        },
        {
            "binary_name":  "libfluidsynth2",
            "binary_version":  "2.1.1-2ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-61722.json"
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

Affected versions

2.*
2.1.7-1.1
2.2.4-2
2.2.5-1
2.2.5-1ubuntu0.1~esm1

Ecosystem specific 

{
    "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-2026-61722.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

Affected versions

2.*
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

Ecosystem specific 

{
    "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-2026-61722.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

Affected versions

2.*
2.4.7+dfsg-2
2.4.8+dfsg-1
2.4.8+dfsg-1ubuntu0.1~esm1

Ecosystem specific 

{
    "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-2026-61722.json"