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CVE-2026-68314

Estado: RecibidaAlta (7.8)—

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

net: mctp i3c: clean up notifier and buses if driver register fails

mctp_i3c_mod_init() registers the I3C bus notifier and then walks the existing buses with i3c_for_each_bus_locked(mctp_i3c_bus_add_new, NULL) before registering the I3C device driver. If i3c_driver_register() fails, the function returns the error directly, leaving the notifier registered and every mctp_i3c_bus object created for the existing buses allocated. The notifier is left pointing into the module that failed to load and the bus list is leaked.

Mirror the module exit path on this failure: unregister the notifier and tear down the buses that were added before returning the error.

Leer descripción completaMostrar menos

This issue was identified during our ongoing static-analysis research while reviewing kernel code.

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 permite escalada local tras autenticación. Fallo de limpieza en notificador e i3c_buses causa DoS y corrupción potencial de estado del kernel si se explota el defecto de inicialización.

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)

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{
  "id": "CVE-2026-68314",
  "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": "c8755b29b58ec65be17bcb8c40763d2dcb1f1db5",
              "lessThan": "49d15cfab247c0f60ce1800bdcd66850beea7b3a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "c8755b29b58ec65be17bcb8c40763d2dcb1f1db5",
              "lessThan": "a8bd8c109da5a87f0c5db0c23cf550d039fde77c",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "c8755b29b58ec65be17bcb8c40763d2dcb1f1db5",
              "lessThan": "a40e83a34eaa2be64372286040696f04eabcd09f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "c8755b29b58ec65be17bcb8c40763d2dcb1f1db5",
              "lessThan": "03d1057305ef17ac3f5936ac1580bc9a1a826e14",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/net/mctp/mctp-i3c.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.7"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.7",
              "versionType": "semver"
            },
            {
              "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": "7.1.6",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/net/mctp/mctp-i3c.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-10T13:20:21.307",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/03d1057305ef17ac3f5936ac1580bc9a1a826e14",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/49d15cfab247c0f60ce1800bdcd66850beea7b3a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/a40e83a34eaa2be64372286040696f04eabcd09f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/a8bd8c109da5a87f0c5db0c23cf550d039fde77c",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mctp i3c: clean up notifier and buses if driver register fails\n\nmctp_i3c_mod_init() registers the I3C bus notifier and then walks the\nexisting buses with i3c_for_each_bus_locked(mctp_i3c_bus_add_new, NULL)\nbefore registering the I3C device driver.  If i3c_driver_register()\nfails, the function returns the error directly, leaving the notifier\nregistered and every mctp_i3c_bus object created for the existing buses\nallocated.  The notifier is left pointing into the module that failed to\nload and the bus list is leaked.\n\nMirror the module exit path on this failure: unregister the notifier and\ntear down the buses that were added before returning the error.\n\nThis issue was identified during our ongoing static-analysis research while\nreviewing kernel code."
    }
  ],
  "lastModified": "2026-08-17T05:18:34.267",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}