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CVE-2026-72109

Estado: RecibidaAlta (7.8)—

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

net: sparx5: unregister blocking notifier on init failure

sparx5_register_notifier_blocks() registers the switchdev blocking notifier before allocating the ordered workqueue. If the workqueue allocation fails, the error path unregisters the switchdev and netdevice notifiers, but leaves the blocking notifier registered.

Add a separate error label for the workqueue allocation failure path and unregister the switchdev blocking notifier there.

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 indica escalada de privilegios local. Fallo en desregistro de notifier durante init puede permitir acceso no autorizado a recursos del kernel con permisos elevados (High C/I/A).

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-2026-72109",
  "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": "d6fce5141929697a27f029c633433d487f6f62cb",
              "lessThan": "fbc65b17508ed5464b7106e7fa5f15251ca1b603",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d6fce5141929697a27f029c633433d487f6f62cb",
              "lessThan": "e5afc6d3fabdf1f605d63c4b34a3df6c359e81f3",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d6fce5141929697a27f029c633433d487f6f62cb",
              "lessThan": "cf419c869e0d03aad4b6f4ecf0a813851930dfe7",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d6fce5141929697a27f029c633433d487f6f62cb",
              "lessThan": "d6084c47389fd6978a5d66b0d58206a548c792a9",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d6fce5141929697a27f029c633433d487f6f62cb",
              "lessThan": "8a3c44a003176282ee4306b7c96e5a536c6f0707",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d6fce5141929697a27f029c633433d487f6f62cb",
              "lessThan": "17f113e7b622dc850992ade540181717de6a8561",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d6fce5141929697a27f029c633433d487f6f62cb",
              "lessThan": "483be61b4a9a6df3b7cb277e8f189e082dee4cb8",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/net/ethernet/microchip/sparx5/sparx5_switchdev.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.14"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "5.14",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.40",
              "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": [
            "drivers/net/ethernet/microchip/sparx5/sparx5_switchdev.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-15T06:21:25.203",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/17f113e7b622dc850992ade540181717de6a8561",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/483be61b4a9a6df3b7cb277e8f189e082dee4cb8",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/8a3c44a003176282ee4306b7c96e5a536c6f0707",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/cf419c869e0d03aad4b6f4ecf0a813851930dfe7",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d6084c47389fd6978a5d66b0d58206a548c792a9",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e5afc6d3fabdf1f605d63c4b34a3df6c359e81f3",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/fbc65b17508ed5464b7106e7fa5f15251ca1b603",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: sparx5: unregister blocking notifier on init failure\n\nsparx5_register_notifier_blocks() registers the switchdev blocking\nnotifier before allocating the ordered workqueue. If the workqueue\nallocation fails, the error path unregisters the switchdev and netdevice\nnotifiers, but leaves the blocking notifier registered.\n\nAdd a separate error label for the workqueue allocation failure path and\nunregister the switchdev blocking notifier there."
    }
  ],
  "lastModified": "2026-08-17T06:18:10.020",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}