{
  "cveId": "CVE-2026-58264",
  "url": "https://patchblox.com/security/cve/CVE-2026-58264",
  "summary": "CVE-2026-58264 is fixed in 4 products on 1 platform, first by DEBIAN-CVE-2026-58264, released July 26, 2026. It is not reported as exploited. Patch Radar priority: Urgent.",
  "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 1.1.2 until 2.5.6, the FluidSynth command handler accepts a pitch_bend_range command whose channel argument is not bounds checked before the supplied value is written through the selected synth channel. An out-of-range channel can therefore cause an out-of-bounds heap write, leading to denial of service or possible code execution. The issue is remotely reachable when the TCP server is enabled through new_fluid_server() or fluidsynth -s, and it is locally reachable through malicious commands delivered to the FluidSynth shell on standard input. Applications that do not use the shell, command handler, or TCP server are not affected. This issue is fixed in version 2.5.6.",
  "published": "2026-09-18T13:17:00Z",
  "severity": "critical",
  "cvss": 9.8,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00586,
  "epssPercentile": 0.48227,
  "priority": "Urgent",
  "priorityTier": 2,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "fluidsynth",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "2.4.4\u002Bdfsg-1\u002Bdeb13u3",
      "fix": "DEBIAN-CVE-2026-58264",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-58264",
      "released": "2026-07-26T13:52:50Z"
    },
    {
      "platform": "linux",
      "product": "fluidsynth",
      "release": "Debian 14",
      "fixedVersion": "2.5.6\u002Bdfsg-1",
      "fix": "DEBIAN-CVE-2026-58264",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-58264",
      "released": "2026-07-26T13:52:50Z"
    },
    {
      "platform": "linux",
      "product": "fluidsynth",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.1.9-1ubuntu0.1~esm1",
      "fix": "fluidsynth 1.1.9-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-fluidsynth-1.1.9-1ubuntu0.1-esm1",
      "released": "2026-10-07T22:10:40Z"
    },
    {
      "platform": "linux",
      "product": "fluidsynth",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.1.1-2ubuntu0.1~esm1",
      "fix": "fluidsynth 2.1.1-2ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-fluidsynth-2.1.1-2ubuntu0.1-esm1",
      "released": "2026-10-07T22:10:46Z"
    },
    {
      "platform": "linux",
      "product": "fluidsynth",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "2.2.5-1ubuntu0.1~esm1",
      "fix": "fluidsynth 2.2.5-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-fluidsynth-2.2.5-1ubuntu0.1-esm1",
      "released": "2026-10-07T22:10:48Z"
    },
    {
      "platform": "linux",
      "product": "fluidsynth",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "2.3.4-1ubuntu0.1~esm1",
      "fix": "fluidsynth 2.3.4-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-fluidsynth-2.3.4-1ubuntu0.1-esm1",
      "released": "2026-10-07T22:10:51Z"
    },
    {
      "platform": "linux",
      "product": "fluidsynth",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "2.4.8\u002Bdfsg-1ubuntu0.1~esm1",
      "fix": "fluidsynth 2.4.8\u002Bdfsg-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-fluidsynth-2.4.8-dfsg-1ubuntu0.1-esm1",
      "released": "2026-09-18T13:17:00Z"
    },
    {
      "platform": "linux",
      "product": "libfluidsynth1",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.1.9-1ubuntu0.1~esm1",
      "fix": "libfluidsynth1 1.1.9-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libfluidsynth1-1.1.9-1ubuntu0.1-esm1",
      "released": "2026-10-07T22:10:40Z"
    },
    {
      "platform": "linux",
      "product": "libfluidsynth2",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.1.1-2ubuntu0.1~esm1",
      "fix": "libfluidsynth2 2.1.1-2ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libfluidsynth2-2.1.1-2ubuntu0.1-esm1",
      "released": "2026-10-07T22:10:46Z"
    },
    {
      "platform": "linux",
      "product": "libfluidsynth3",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "2.2.5-1ubuntu0.1~esm1",
      "fix": "libfluidsynth3 2.2.5-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libfluidsynth3-2.2.5-1ubuntu0.1-esm1",
      "released": "2026-10-07T22:10:48Z"
    },
    {
      "platform": "linux",
      "product": "libfluidsynth3",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "2.3.4-1ubuntu0.1~esm1",
      "fix": "libfluidsynth3 2.3.4-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libfluidsynth3-2.3.4-1ubuntu0.1-esm1",
      "released": "2026-10-07T22:10:51Z"
    },
    {
      "platform": "linux",
      "product": "libfluidsynth3",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "2.4.8\u002Bdfsg-1ubuntu0.1~esm1",
      "fix": "libfluidsynth3 2.4.8\u002Bdfsg-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-libfluidsynth3-2.4.8-dfsg-1ubuntu0.1-esm1",
      "released": "2026-09-18T13:17:00Z"
    }
  ],
  "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"
  }
}