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CVE-2026-72114

Estado: RecibidaAlta (7.8)—

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

can: bcm: validate frame length in bcm_rx_setup() for RTR replies

bcm_tx_setup() validates cf->len against the CAN/CAN FD DLC limits before installing frames for TX_SETUP, but bcm_rx_setup() never did the same for the RTR-reply frame configured via RX_SETUP with RX_RTR_FRAME.

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).

🎯 Técnicas ATT&CK

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

Acceso local (AV:L) sin interacción de usuario permite escalada de privilegios en el kernel Linux explotando validación deficiente de frames CAN en bcm_rx_setup(), resultando en ejecución de código o DoS.

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 PreventionThreat Intelligence ProgramRestrict Web-Based ContentPrivileged Account ManagementLimit Software InstallationFilter Network Traffic

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-72114",
  "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
      }
    ]
  },
  "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": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
              "lessThan": "cc1f9569f1c1adf74fa69d6f716a31b58a2fc6ce",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
              "lessThan": "204f2b232717bc470ddb9e1da1d27dd9c6ef0caa",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
              "lessThan": "e061624c0a86c3c26a2bf017e432fbc93ad68f3a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
              "lessThan": "7d966cdee006911d3957e1a4e72cb93c39cd8c1e",
              "versionType": "git"
            },
            {
              "status": "affected",
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              "lessThan": "1b475c0c72f44622a320a4386ce9e76f85e69bc7",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
              "lessThan": "deb6a697cce3f021e731df543597f37a5e54caab",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
              "lessThan": "59bfddea64159594feb62ef11b7d7a33c8ee3783",
              "versionType": "git"
            },
            {
              "status": "affected",
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              "lessThan": "62ec41f364648be79d54d94d0d240ee326948afd",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "net/can/bcm.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.25"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "2.6.25",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.10.265",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.216",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.148",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.101",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.42",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "net/can/bcm.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-15T06:21:25.803",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/1b475c0c72f44622a320a4386ce9e76f85e69bc7",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/204f2b232717bc470ddb9e1da1d27dd9c6ef0caa",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/59bfddea64159594feb62ef11b7d7a33c8ee3783",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/62ec41f364648be79d54d94d0d240ee326948afd",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/7d966cdee006911d3957e1a4e72cb93c39cd8c1e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/cc1f9569f1c1adf74fa69d6f716a31b58a2fc6ce",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/deb6a697cce3f021e731df543597f37a5e54caab",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e061624c0a86c3c26a2bf017e432fbc93ad68f3a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: bcm: validate frame length in bcm_rx_setup() for RTR replies\n\nbcm_tx_setup() validates cf->len against the CAN/CAN FD DLC limits\nbefore installing frames for TX_SETUP, but bcm_rx_setup() never did\nthe same for the RTR-reply frame configured via RX_SETUP with\nRX_RTR_FRAME."
    }
  ],
  "lastModified": "2026-08-19T17:20:57.650",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}