CVE-2023-53559

Estado: ModificadaAlta (7.8)—

In the Linux kernel, the following vulnerability has been resolved:

ip_vti: fix potential slab-use-after-free in decode_session6

When ip_vti device is set to the qdisc of the sfb type, the cb field of the sent skb may be modified during enqueuing. Then, slab-use-after-free may occur when ip_vti device sends IPv6 packets. As commit f855691975bb ("xfrm6: Fix the nexthdr offset in _decode_session6.") showed, xfrm_decode_session was originally intended only for the receive path. IP6CB(skb)->nhoff is not set during transmission. Therefore, set the cb field in the skb to 0 before sending packets.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Puntuación base: 7.8

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.15%
Percentil entre todas las CVEs puntuadas: 4
Fecha de la puntuación: 5/10/2026

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

ExplotaciónT1068 Exploitation for Privilege Escalationprivilege escalation80 %
Impacto principalT1059 Command and Scripting Interpreterexecution70 %

Vulnerabilidad local (AV:L/PR:L) en kernel Linux que permite escalada de privilegios mediante uso after free. Afecta a transmisión de paquetes IPv6 en dispositivos VTI, permitiendo ejecución de código.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Execution Prevention Threat Intelligence Program Restrict Web-Based Content Privileged Account Management Limit Software Installation Behavior Prevention on Endpoint

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

CWE-416

Referencias

JSON original (NVD)

Mostrar

{
  "id": "CVE-2023-53559",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1.8
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "f855691975bb06373a98711e4cfe2c224244b536",
              "lessThan": "82fb41c5de243e7dfa90f32ca58e35adaff56c1d",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f855691975bb06373a98711e4cfe2c224244b536",
              "lessThan": "7dfe23659f3677c08a60a0056cda2d91a79c15ca",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f855691975bb06373a98711e4cfe2c224244b536",
              "lessThan": "d34c30442d5e53a33cde79ca163320dbe2432cbd",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f855691975bb06373a98711e4cfe2c224244b536",
              "lessThan": "0b4d69539fdea138af2befe08893850c89248068",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f855691975bb06373a98711e4cfe2c224244b536",
              "lessThan": "e1e04cc2ef2c0c0866c19f5627149a76c2baae32",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f855691975bb06373a98711e4cfe2c224244b536",
              "lessThan": "2b05bf5dc437f7891dd409a3eaf5058459391c7a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f855691975bb06373a98711e4cfe2c224244b536",
              "lessThan": "78e397a43e1c47321a4679cc49a6c4530bf820b9",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f855691975bb06373a98711e4cfe2c224244b536",
              "lessThan": "6018a266279b1a75143c7c0804dd08a5fc4c3e0b",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "net/ipv4/ip_vti.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.19"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "3.19",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "4.14.324",
              "versionType": "semver",
              "lessThanOrEqual": "4.14.*"
            },
            {
              "status": "unaffected",
              "version": "4.19.293",
              "versionType": "semver",
              "lessThanOrEqual": "4.19.*"
            },
            {
              "status": "unaffected",
              "version": "5.4.255",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "status": "unaffected",
              "version": "5.10.192",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.128",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.47",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.4.12",
              "versionType": "semver",
              "lessThanOrEqual": "6.4.*"
            },
            {
              "status": "unaffected",
              "version": "6.5",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "net/ipv4/ip_vti.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-10-04T16:15:51.280",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/0b4d69539fdea138af2befe08893850c89248068",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/2b05bf5dc437f7891dd409a3eaf5058459391c7a",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6018a266279b1a75143c7c0804dd08a5fc4c3e0b",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/78e397a43e1c47321a4679cc49a6c4530bf820b9",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/7dfe23659f3677c08a60a0056cda2d91a79c15ca",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/82fb41c5de243e7dfa90f32ca58e35adaff56c1d",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d34c30442d5e53a33cde79ca163320dbe2432cbd",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e1e04cc2ef2c0c0866c19f5627149a76c2baae32",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nip_vti: fix potential slab-use-after-free in decode_session6\n\nWhen ip_vti device is set to the qdisc of the sfb type, the cb field\nof the sent skb may be modified during enqueuing. Then,\nslab-use-after-free may occur when ip_vti device sends IPv6 packets.\nAs commit f855691975bb (\"xfrm6: Fix the nexthdr offset in\n_decode_session6.\") showed, xfrm_decode_session was originally intended\nonly for the receive path. IP6CB(skb)->nhoff is not set during\ntransmission. Therefore, set the cb field in the skb to 0 before\nsending packets."
    }
  ],
  "lastModified": "2026-08-04T10:19:12.287",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "4371BCA6-0BDB-46C3-8352-15702F5E81A2",
              "versionEndExcluding": "4.14.324",
              "versionStartIncluding": "3.19.1"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "39603052-E341-4096-8535-38D44A60E845",
              "versionEndExcluding": "4.19.293",
              "versionStartIncluding": "4.15"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "1379E40A-2AC3-484E-929A-7F46B6C3B521",
              "versionEndExcluding": "5.4.255",
              "versionStartIncluding": "4.20"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "9396FFDC-6A0D-44B7-9368-21B456F6D4AE",
              "versionEndExcluding": "5.10.192",
              "versionStartIncluding": "5.5"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "1415629F-F97B-4880-BA1E-AF3DBB8EF305",
              "versionEndExcluding": "5.15.128",
              "versionStartIncluding": "5.11"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "2EEA01B0-0151-4E0F-B140-1A441EEDD717",
              "versionEndExcluding": "6.1.47",
              "versionStartIncluding": "5.16"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "CF8ECF64-40AE-49AB-8315-4D83F9F56ECF",
              "versionEndExcluding": "6.4.12",
              "versionStartIncluding": "6.2"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:3.19:-:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "8C54596F-5461-44C4-91FB-7453BE905748"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:3.19:rc7:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "5843CB48-122D-496D-B66D-35296BC0EFB1"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.5:rc1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "0B3E6E4D-E24E-4630-B00C-8C9901C597B0"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.5:rc2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E4A01A71-0F09-4DB2-A02F-7EFFBE27C98D"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.5:rc3:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F5608371-157A-4318-8A2E-4104C3467EA1"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.5:rc4:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "2226A776-DF8C-49E0-A030-0A7853BB018A"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.5:rc5:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "6F15C659-DF06-455A-9765-0E6DE920F29A"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.5:rc6:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "5B1C14ED-ABC4-41D3-8D9C-D38C6A65B4DE"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}