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CVE-2022-31117

Estado: ModificadaMedia (5.9)—

UltraJSON is a fast JSON encoder and decoder written in pure C with bindings for Python 3.7+. In versions prior to 5.4.0 an error occurring while reallocating a buffer for string decoding can cause the buffer to get freed twice. Due to how UltraJSON uses the internal decoder, this double free is impossible to trigger from Python. This issue has been resolved in version 5.4.0 and all users should upgrade to UltraJSON 5.4.0. There are no known workarounds for this issue.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (2)

Fedoraproject — FedoraUltrajson Project — Ultrajson

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2022-31117",
  "cveTags": [],
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          "id": "CVE-2022-31117",
          "role": "CISA Coordinator",
          "options": [
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              "exploitation": "none"
            },
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              "automatable": "no"
            },
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              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-04-23T14:03:59.440728Z"
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          "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
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          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
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        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
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  "published": "2022-07-05T18:15:08.087",
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          "value": "CWE-415"
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      "lang": "en",
      "value": "UltraJSON is a fast JSON encoder and decoder written in pure C with bindings for Python 3.7+. In versions prior to 5.4.0 an error occurring while reallocating a buffer for string decoding can cause the buffer to get freed twice. Due to how UltraJSON uses the internal decoder, this double free is impossible to trigger from Python. This issue has been resolved in version 5.4.0 and all users should upgrade to UltraJSON 5.4.0. There are no known workarounds for this issue."
    },
    {
      "lang": "es",
      "value": "UltraJSON es un codificador y decodificador JSON rápido escrito en C puro con enlaces para Python versiones 3.7+.&#xa0;En versiones anteriores a la 5.4.0, un error al reasignar un búfer para la decodificación de cadenas puede hacer que el búfer se libere dos veces.&#xa0;Debido a cómo UltraJSON usa el decodificador interno, esta doble liberación es imposible de activar desde Python.&#xa0;Este problema ha sido resuelto en la versión 5.4.0 y todos los usuarios deben actualizar a UltraJSON 5.4.0.&#xa0;No se conocen mitigaciones adicionales para este problema"
    }
  ],
  "lastModified": "2026-06-17T04:44:50.313",
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