{
  "id": "CVE-2022-48961",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2024-10-21T20:15:07.887",
  "lastModified": "2024-10-24T20:02:22.347",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mdio: fix unbalanced fwnode reference count in mdio_device_release()\n\nThere is warning report about of_node refcount leak\nwhile probing mdio device:\n\nOF: ERROR: memory leak, expected refcount 1 instead of 2,\nof_node_get()/of_node_put() unbalanced - destroy cset entry:\nattach overlay node /spi/soc@0/mdio@710700c0/ethernet@4\n\nIn of_mdiobus_register_device(), we increase fwnode refcount\nby fwnode_handle_get() before associating the of_node with\nmdio device, but it has never been decreased in normal path.\nSince that, in mdio_device_release(), it needs to call\nfwnode_handle_put() in addition instead of calling kfree()\ndirectly.\n\nAfter above, just calling mdio_device_free() in the error handle\npath of of_mdiobus_register_device() is enough to keep the\nrefcount balanced."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: mdio: arregla el recuento de referencias de fwnode no balanceado en mdio_device_release() Hay un informe de advertencia sobre una fuga de recuento de referencias de of_node mientras se sondea el dispositivo mdio: OF: ERROR: fuga de memoria, se esperaba un recuento de referencias de 1 en lugar de 2, of_node_get()/of_node_put() no balanceado - destruye la entrada de cset: adjunta el nodo superpuesto /spi/soc@0/mdio@710700c0/ethernet@4 En of_mdiobus_register_device(), aumentamos el recuento de referencias de fwnode mediante fwnode_handle_get() antes de asociar el of_node con el dispositivo mdio, pero nunca se ha reducido en la ruta normal. Desde entonces, en mdio_device_release(), necesita llamar a fwnode_handle_put() adem\u00e1s en lugar de llamar a kfree() directamente. Despu\u00e9s de lo anterior, simplemente llamar a mdio_device_free() en la ruta del controlador de errores de of_mdiobus_register_device() es suficiente para mantener el recuento de referencias equilibrado."
    }
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          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
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        "impactScore": 3.6
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