Upstream information

CVE-2025-68617 at MITRE

Description

FluidSynth is a software synthesizer based on the SoundFont 2 specifications. From versions 2.5.0 to before 2.5.2, a race condition during unloading of a DLS file can trigger a heap-based use-after-free. A concurrently running thread may be pending to unload a DLS file, leading to use of freed memory, if the synthesizer is being concurrently destroyed, or samples of the (unloaded) DLS file are concurrently used to synthesize audio. This issue has been patched in version 2.5.2. The problem will not occur, when explicitly unloading a DLS file (before synth destruction), provided that at the time of unloading, no samples of the respective file are used by active voices. The problem will not occur in versions of FluidSynth that have been compiled without native DLS support.

SUSE information

Overall state of this security issue: Does not affect SUSE products

This issue is currently rated as having important severity.

CVSS v3 Scores
CVSS detail CNA (GitHub) National Vulnerability Database
Base Score 7 7
Vector CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector Local Local
Attack Complexity High High
Privileges Required None None
User Interaction Required Required
Scope Unchanged Unchanged
Confidentiality Impact High High
Integrity Impact High High
Availability Impact High High
CVSSv3 Version 3.1 3.1
SUSE Bugzilla entry: 1255519 [NEW]

No SUSE Security Announcements cross referenced.

List of released packages

Product(s) Fixed package version(s) References
openSUSE Tumbleweed
  • fluidsynth >= 2.5.2-1.1
  • fluidsynth-devel >= 2.5.2-1.1
  • libfluidsynth3 >= 2.5.2-1.1
  • libfluidsynth3-32bit >= 2.5.2-1.1
 Patchnames:
openSUSE-Tumbleweed-2026-10004

SUSE Timeline for this CVE

CVE page created: Wed Dec 24 02:02:41 2025
CVE page last modified: Thu Jan 15 13:17:44 2026