CVE-2025-68617 SUSE CVE security@suse.de SUSE Security Team SUSE CVE-2025-68617 Interim 1 1 2026-03-05T00:21:40Z current 2026-03-05T00:21:40Z 2026-03-05T00:21:40Z cve-database/bin/generate-cvrf-cve.pl 2020-12-27T01:00:00Z CVE-2025-68617 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. The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). https://www.suse.com/support/security/rating/ SUSE Security Ratings 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 fluidsynth-2.5.2-1.1 as a component of openSUSE Tumbleweed fluidsynth-devel-2.5.2-1.1 as a component of openSUSE Tumbleweed libfluidsynth3-2.5.2-1.1 as a component of openSUSE Tumbleweed libfluidsynth3-32bit-2.5.2-1.1 as a component of openSUSE Tumbleweed 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. CVE-2025-68617 openSUSE Tumbleweed:fluidsynth-2.5.2-1.1 openSUSE Tumbleweed:fluidsynth-devel-2.5.2-1.1 openSUSE Tumbleweed:libfluidsynth3-2.5.2-1.1 openSUSE Tumbleweed:libfluidsynth3-32bit-2.5.2-1.1 important 7 CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H