DEBIAN-CVE-2026-61723

See a problem?
Please try reporting it to the source first.
Source
https://security-tracker.debian.org/tracker/CVE-2026-61723
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-61723.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-61723
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 ptbl chunks with the unsigned expression cues * 4 + cbsize without checking whether the multiplication and addition fit in 32 bits. A crafted DLS file can supply a large cues value that wraps the expression and passes the chunk-size check, causing poolcues.resize(cues) to request approximately four gigabytes and the parser to read billions of entries beyond the chunk boundary. The excessive allocation and invalid reads can cause denial of service. Builds with enable-native-dls set to OFF are not exposed. 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-2026-61723.json"