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CVE-2013-4563

Estado: ModificadaAlta (7.1)—

La función udp6_ufo_fragment en net/ipv6/udp_offload.c del kernel de Linux hasta la versión 3.12, cuando está activado UDP Fragmentation Offload (UFO), no realiza adecuadamente comparaciones de cierto tamaño antes de insertar una cabecera fragmentada, lo que permite a atacantes remotos provocar una denegación de servicio (panic) a través de un paquete IPv6 UDP grande, tal y como se demostró mediante el uso de Token Bucket Filter (TBF).

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)

Canonical — Ubuntu LinuxLinux — Linux Kernel

CWE

Referencias

JSON original (NVD)

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          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:C",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "NONE"
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        "acInsufInfo": false,
        "impactScore": 6.9,
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        "obtainAllPrivilege": false,
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          "versions": [
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  "published": "2013-11-20T13:19:41.697",
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      "value": "The udp6_ufo_fragment function in net/ipv6/udp_offload.c in the Linux kernel through 3.12, when UDP Fragmentation Offload (UFO) is enabled, does not properly perform a certain size comparison before inserting a fragment header, which allows remote attackers to cause a denial of service (panic) via a large IPv6 UDP packet, as demonstrated by use of the Token Bucket Filter (TBF) queueing discipline."
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  ],
  "lastModified": "2026-06-16T23:57:27.573",
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