{
  "cveId": "CVE-2026-61721",
  "url": "https://patchblox.com/security/cve/CVE-2026-61721",
  "summary": "CVE-2026-61721 is fixed in fluidsynth on 1 platform by DEBIAN-CVE-2026-61721 (version 2.5.6\u002Bdfsg-1), released July 26, 2026. 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 2.5.0 until 2.5.6, the native DLS loader assigns file-controlled wsmp.loop_start and wsmp.loop_length values to samples without calling fluid_sample_validate() or fluid_sample_sanitize_loop(). A crafted DLS file can place sample loop points beyond the sample buffer, causing out-of-bounds reads during audio rendering, undefined behavior, possible memory disclosure, and denial of service. Builds compiled with the CMake option enable-native-dls set to OFF do not expose the affected parser. This issue is fixed in version 2.5.6.",
  "published": "2026-09-18T20:17:18Z",
  "severity": "high",
  "cvss": 8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H",
  "epss": 0.00192,
  "epssPercentile": 0.08867,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "fluidsynth",
      "release": "Debian 14",
      "fixedVersion": "2.5.6\u002Bdfsg-1",
      "fix": "DEBIAN-CVE-2026-61721",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-61721",
      "released": "2026-07-26T13:52:50Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T07:25:28Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}