{
  "cveId": "CVE-2026-61720",
  "url": "https://patchblox.com/security/cve/CVE-2026-61720",
  "summary": "CVE-2026-61720 is fixed in fluidsynth on 1 platform by DEBIAN-CVE-2026-61720 (version 2.5.6\u002Bdfsg-1), released July 26, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "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 SF2 parser computes the DMOD modulator count as chunk.size / SF_MOD_SIZE - 1 without rejecting chunks smaller than one record. A crafted SF2 file containing a zero-sized DMOD chunk makes the unsigned subtraction wrap to UINT_MAX, and the parser then attempts billions of SFMod allocations. This exhausts process memory and causes denial of service. No workaround is available. This issue is fixed in version 2.5.6.",
  "published": "2026-09-18T20:17:18Z",
  "severity": "medium",
  "cvss": 6.2,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00184,
  "epssPercentile": 0.07995,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "fluidsynth",
      "release": "Debian 14",
      "fixedVersion": "2.5.6\u002Bdfsg-1",
      "fix": "DEBIAN-CVE-2026-61720",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-61720",
      "released": "2026-07-26T13:52:50Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}