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CVE-2026-80992

Estado: RecibidaAlta (7.8)—

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

net: ravb: avoid dereferencing an invalid PTP clock

The PTP clock is unavailable before the first open, so querying its index can dereference a NULL pointer. Registration failures can also leave an error pointer in priv->ptp.clock.

Cache the PHC index separately and report -1 while no clock is registered. Normalize registration errors to NULL and preserve the static timestamping capabilities.

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.

AV:L + PR:L sin UI:R → escalada de privilegios local. NULL pointer dereference en kernel PTP permite DoS y corrupción de memoria en contexto privilegiado.

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

Threat Intelligence ProgramRestrict File and Directory PermissionsRemote Data StorageFilter Network TrafficExecution PreventionEncrypt Sensitive Information

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)

Mostrar
{
  "id": "CVE-2026-80992",
  "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": "a0d2f20650e81407d8e51ad2cbdc492861c74e9c",
              "lessThan": "29ffd972531f8e6e0edf4ea3496190acff9fc9c2",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a0d2f20650e81407d8e51ad2cbdc492861c74e9c",
              "lessThan": "bf3308416a2be85dcc9965b614a745b40beeff14",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a0d2f20650e81407d8e51ad2cbdc492861c74e9c",
              "lessThan": "fc710f89a644e030a7ca15343176ca862fd61b9d",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a0d2f20650e81407d8e51ad2cbdc492861c74e9c",
              "lessThan": "8d4d06d6e2b501cb8e30ed3b1924c470358e8052",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a0d2f20650e81407d8e51ad2cbdc492861c74e9c",
              "lessThan": "0aaa53936419cf0c19c670387fc6d431e042a1b6",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a0d2f20650e81407d8e51ad2cbdc492861c74e9c",
              "lessThan": "1f77af0aaf277413ff32f6ff8c2c4282bd64c897",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/net/ethernet/renesas/ravb.h",
            "drivers/net/ethernet/renesas/ravb_main.c",
            "drivers/net/ethernet/renesas/ravb_ptp.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.2"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "4.2",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.109",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.50",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2.4",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/net/ethernet/renesas/ravb.h",
            "drivers/net/ethernet/renesas/ravb_main.c",
            "drivers/net/ethernet/renesas/ravb_ptp.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-11T20:19:06.110",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/0aaa53936419cf0c19c670387fc6d431e042a1b6",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/1f77af0aaf277413ff32f6ff8c2c4282bd64c897",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/29ffd972531f8e6e0edf4ea3496190acff9fc9c2",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/8d4d06d6e2b501cb8e30ed3b1924c470358e8052",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/bf3308416a2be85dcc9965b614a745b40beeff14",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/fc710f89a644e030a7ca15343176ca862fd61b9d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ravb: avoid dereferencing an invalid PTP clock\n\nThe PTP clock is unavailable before the first open, so querying its\nindex can dereference a NULL pointer. Registration failures can also\nleave an error pointer in priv->ptp.clock.\n\nCache the PHC index separately and report -1 while no clock is\nregistered. Normalize registration errors to NULL and preserve the\nstatic timestamping capabilities."
    }
  ],
  "lastModified": "2026-09-14T13:18:53.900",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}