DEBIAN-CVE-2026-61722

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Source
https://security-tracker.debian.org/tracker/CVE-2026-61722
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-61722.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-61722
Upstream
Published
2026-09-18T20:17:18Z
Modified
2026-09-19T05:00:10Z
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
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

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-2026-61722.json"