CVE-2025-68617

{
  "id": "CVE-2025-68617",
  "sourceIdentifier": "[email protected]",
  "published": "2025-12-23T23:15:44.757",
  "lastModified": "2026-10-19T22:10:00.130",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    },
    {
      "lang": "es",
      "value": "FluidSynth es un sintetizador de software basado en las especificaciones SoundFont?2. Desde la versión 2.5.0 hasta versiones anteriores a la 2.5.2, una condición de carrera durante la descarga de un archivo DLS puede provocar un uso después de liberación basado en el heap. Un hilo que se ejecuta simultáneamente puede quedar pendiente de descargar un archivo DLS, lo que lleva al uso de memoria liberada, si el sintetizador se destruye concurrentemente, o si las muestras del archivo DLS (descargado) se utilizan simultáneamente para sintetizar audio. Este problema se corrigió en la versión 2.5.2. El problema no se producirá al descargar explícitamente un archivo DLS (antes de la destrucción del sintetizador), siempre que, en el momento de la descarga, no se estén usando muestras del archivo respectivo en voces activas. El problema tampoco se producirá en versiones de FluidSynth que se hayan compilado sin soporte nativo para DLS."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "FluidSynth",
          "product": "fluidsynth",
          "versions": [
            {
              "version": ">= 2.5.0, < 2.5.2",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "baseScore": 7.0,
          "baseSeverity": "HIGH",
          "attackVector": "LOCAL",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.0,
        "impactScore": 5.9
      },
      {
        "source": "[email protected]",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "baseScore": 7.0,
          "baseSeverity": "HIGH",
          "attackVector": "LOCAL",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.0,
        "impactScore": 5.9
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2025-12-24T14:53:30.321128Z",
          "id": "CVE-2025-68617",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:fluidsynth:fluidsynth:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "2.5.0",
              "versionEndExcluding": "2.5.2",
              "matchCriteriaId": "2FC707E6-47FF-47FE-83A7-B93AA1364D07"
            }
          ]
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  ],
  "references": [
    {
      "url": "https://github.com/FluidSynth/fluidsynth/commit/685e54cdc44911ace31774260bd0c9ec89887491",
      "source": "[email protected]",
      "tags": [
        "Patch"
      ]
    },
    {
      "url": "https://github.com/FluidSynth/fluidsynth/commit/962b9946b5cb6b16f0c08b89dd1b7016d4fce886",
      "source": "[email protected]",
      "tags": [
        "Patch"
      ]
    },
    {
      "url": "https://github.com/FluidSynth/fluidsynth/issues/1717",
      "source": "[email protected]",
      "tags": [
        "Exploit",
        "Issue Tracking"
      ]
    },
    {
      "url": "https://github.com/FluidSynth/fluidsynth/issues/1728",
      "source": "[email protected]",
      "tags": [
        "Issue Tracking"
      ]
    },
    {
      "url": "https://github.com/FluidSynth/fluidsynth/security/advisories/GHSA-ffw2-xvvp-39ch",
      "source": "[email protected]",
      "tags": [
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://github.com/FluidSynth/fluidsynth/issues/1717",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Exploit",
        "Issue Tracking"
      ]
    },
    {
      "url": "https://github.com/FluidSynth/fluidsynth/issues/1728",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Issue Tracking"
      ]
    }
  ]
}