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CVE-2022-26495

Estado: ModificadaCrítica (9.8)—

In nbd-server in nbd before 3.24, there is an integer overflow with a resultant heap-based buffer overflow. A value of 0xffffffff in the name length field will cause a zero-sized buffer to be allocated for the name, resulting in a write to a dangling pointer. This issue exists for the NBD_OPT_INFO, NBD_OPT_GO, and NBD_OPT_EXPORT_NAME messages.

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 (3)

Debian — Debian LinuxFedoraproject — FedoraNetwork Block Device Project — Network Block Device

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2022-26495",
  "cveTags": [],
  "metrics": {
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          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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  "published": "2022-03-06T06:15:07.303",
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      "description": [
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          "lang": "en",
          "value": "CWE-190"
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      "lang": "en",
      "value": "In nbd-server in nbd before 3.24, there is an integer overflow with a resultant heap-based buffer overflow. A value of 0xffffffff in the name length field will cause a zero-sized buffer to be allocated for the name, resulting in a write to a dangling pointer. This issue exists for the NBD_OPT_INFO, NBD_OPT_GO, and NBD_OPT_EXPORT_NAME messages."
    },
    {
      "lang": "es",
      "value": "En nbd-server en nbd versiones anteriores a 3.24, se presenta un desbordamiento de enteros con un desbordamiento de búfer en la región heap de la memoria resultante. Un valor de 0xffffff en el campo de longitud del nombre causará que se asigne un búfer de tamaño cero para el nombre, resultando en una escritura en un puntero colgante. Este problema se presenta para los mensajes NBD_OPT_INFO, NBD_OPT_GO y NBD_OPT_EXPORT_NAME"
    }
  ],
  "lastModified": "2026-06-17T04:35:17.903",
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}