{
  "cveId": "CVE-2025-68617",
  "url": "https://patchblox.com/security/cve/CVE-2025-68617",
  "summary": "CVE-2025-68617 is fixed in fluidsynth on 1 platform by DEBIAN-CVE-2025-68617 (version 2.5.2\u002Bdfsg-1), released December 23, 2025. It is not reported as exploited. Patch Radar priority: High.",
  "title": "fluidsynth: FluidSynth is a software synthesizer based on the SoundFont 2 specifications",
  "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.",
  "published": "2025-12-23T23:15:44Z",
  "severity": "high",
  "cvss": 7,
  "cvssVector": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
  "epss": 0.00213,
  "epssPercentile": 0.11677,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "fluidsynth",
      "release": "Debian 14",
      "fixedVersion": "2.5.2\u002Bdfsg-1",
      "fix": "DEBIAN-CVE-2025-68617",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2025-68617",
      "released": "2025-12-23T23:15:44Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}