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CVE-2026-74603

Estado: RecibidaAlta (7.1)—

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

ptp: ocp: Fix board ID over-read

The EEPROM board ID is a fixed 13-byte field and is not guaranteed to contain a NUL terminator. Passing it directly to devlink_info_version_fixed_put() treats it as a C string and may read beyond the field.

Format at most OCP_BOARD_ID_LEN bytes into the existing local buffer before reporting the ID. Use a precision limit because the snprintf() output size alone does not bound the source string scan.

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.

Vulnerabilidad de lectura de memoria (buffer over-read) en kernel Linux con AV:L PR:L UI:N que permite a usuario local acceder a datos sensibles del EEPROM sin interacción.

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 ProgramExecution PreventionApplication Isolation and SandboxingExploit ProtectionUpdate SoftwareData Loss Prevention

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-2026-74603",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.1,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.2,
        "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": "0cfcdd1ebcfe1a9b262f6ad8419580720dc843c4",
              "lessThan": "72ef3ce80078199bfad32f98d055f44ba7cd0c3d",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "0cfcdd1ebcfe1a9b262f6ad8419580720dc843c4",
              "lessThan": "3d965811be78473654e6e8cc8e4fb7b6b87aa6c1",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "0cfcdd1ebcfe1a9b262f6ad8419580720dc843c4",
              "lessThan": "f92558bbe78d6284fedd053900f82a70f0aa8707",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "0cfcdd1ebcfe1a9b262f6ad8419580720dc843c4",
              "lessThan": "5fd91dd4a143479b0575fb1f202ec1c501e71fd5",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "0cfcdd1ebcfe1a9b262f6ad8419580720dc843c4",
              "lessThan": "f8d7e5751267637190eff887c971d5b468106213",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "0cfcdd1ebcfe1a9b262f6ad8419580720dc843c4",
              "lessThan": "6b69f2ef10cdb018c0b127a7cab88e590bbddba4",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/ptp/ptp_ocp.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.18"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "5.18",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.152",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.104",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.45",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.1.9",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/ptp/ptp_ocp.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-22T16:16:32.750",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/3d965811be78473654e6e8cc8e4fb7b6b87aa6c1",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/5fd91dd4a143479b0575fb1f202ec1c501e71fd5",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6b69f2ef10cdb018c0b127a7cab88e590bbddba4",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/72ef3ce80078199bfad32f98d055f44ba7cd0c3d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/f8d7e5751267637190eff887c971d5b468106213",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/f92558bbe78d6284fedd053900f82a70f0aa8707",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nptp: ocp: Fix board ID over-read\n\nThe EEPROM board ID is a fixed 13-byte field and is not guaranteed to\ncontain a NUL terminator. Passing it directly to\ndevlink_info_version_fixed_put() treats it as a C string and may read\nbeyond the field.\n\nFormat at most OCP_BOARD_ID_LEN bytes into the existing local buffer\nbefore reporting the ID. Use a precision limit because the snprintf()\noutput size alone does not bound the source string scan."
    }
  ],
  "lastModified": "2026-08-25T06:18:36.303",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}