FKIE_CVE-2022-49016

Vulnerability from fkie_nvd - Published: 2024-10-21 20:15 - Updated: 2026-06-17 05:16
Severity
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: net: mdiobus: fix unbalanced node reference count I got the following report while doing device(mscc-miim) load test with CONFIG_OF_UNITTEST and CONFIG_OF_DYNAMIC enabled: OF: ERROR: memory leak, expected refcount 1 instead of 2, of_node_get()/of_node_put() unbalanced - destroy cset entry: attach overlay node /spi/soc@0/mdio@7107009c/ethernet-phy@0 If the 'fwnode' is not an acpi node, the refcount is get in fwnode_mdiobus_phy_device_register(), but it has never been put when the device is freed in the normal path. So call fwnode_handle_put() in phy_device_release() to avoid leak. If it's an acpi node, it has never been get, but it's put in the error path, so call fwnode_handle_get() before phy_device_register() to keep get/put operation balanced.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2708b357440427d6a9fee667eb7b8307f4625adcPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/543d917f691ab06885ee779c862065899eaa4251Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cdde1560118f82498fc9e9a7c1ef7f0ef7755891Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.1
linux linux_kernel 6.1
linux linux_kernel 6.1
linux linux_kernel 6.1
linux linux_kernel 6.1
linux linux_kernel 6.1
linux linux_kernel 6.1
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/mdio/fwnode_mdio.c",
            "drivers/net/phy/phy_device.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "543d917f691ab06885ee779c862065899eaa4251",
              "status": "affected",
              "version": "bc1bee3b87ee48bd97ef7fd306445132ba2041b0",
              "versionType": "git"
            },
            {
              "lessThan": "2708b357440427d6a9fee667eb7b8307f4625adc",
              "status": "affected",
              "version": "bc1bee3b87ee48bd97ef7fd306445132ba2041b0",
              "versionType": "git"
            },
            {
              "lessThan": "cdde1560118f82498fc9e9a7c1ef7f0ef7755891",
              "status": "affected",
              "version": "bc1bee3b87ee48bd97ef7fd306445132ba2041b0",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/mdio/fwnode_mdio.c",
            "drivers/net/phy/phy_device.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.14"
            },
            {
              "lessThan": "5.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.82",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.12",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
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              "matchCriteriaId": "6B49AE96-FD69-40D4-A29C-DC4DB7DE3CDB",
              "versionEndExcluding": "5.15.82",
              "versionStartIncluding": "5.14",
              "vulnerable": true
            },
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mdiobus: fix unbalanced node reference count\n\nI got the following report while doing device(mscc-miim) load test\nwith CONFIG_OF_UNITTEST and CONFIG_OF_DYNAMIC enabled:\n\n  OF: ERROR: memory leak, expected refcount 1 instead of 2,\n  of_node_get()/of_node_put() unbalanced - destroy cset entry:\n  attach overlay node /spi/soc@0/mdio@7107009c/ethernet-phy@0\n\nIf the \u0027fwnode\u0027 is not an acpi node, the refcount is get in\nfwnode_mdiobus_phy_device_register(), but it has never been\nput when the device is freed in the normal path. So call\nfwnode_handle_put() in phy_device_release() to avoid leak.\n\nIf it\u0027s an acpi node, it has never been get, but it\u0027s put\nin the error path, so call fwnode_handle_get() before\nphy_device_register() to keep get/put operation balanced."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: mdiobus: arregla el recuento de referencias de nodos desequilibrados Obtuve el siguiente informe mientras realizaba la prueba de carga del dispositivo (mscc-miim) con CONFIG_OF_UNITTEST y CONFIG_OF_DYNAMIC habilitados: OF: ERROR: p\u00e9rdida de memoria, se esperaba un recuento de referencias 1 en lugar de 2, of_node_get()/of_node_put() desequilibrado - destruye la entrada cset: adjuntar un nodo superpuesto /spi/soc@0/mdio@7107009c/ethernet-phy@0 Si el \u0027fwnode\u0027 no es un nodo acpi, el recuento de referencias se obtiene en fwnode_mdiobus_phy_device_register(), pero nunca se ha colocado cuando el dispositivo se libera en la ruta normal. Entonces llama a fwnode_handle_put() en phy_device_release() para evitar la p\u00e9rdida. Si es un nodo acpi, nunca se ha obtenido, pero se coloca en la ruta de error, por lo que se llama a fwnode_handle_get() antes de phy_device_register() para mantener equilibrada la operaci\u00f3n de obtenci\u00f3n/colocaci\u00f3n."
    }
  ],
  "id": "CVE-2022-49016",
  "lastModified": "2026-06-17T05:16:51.450",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2022-49016",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-10-22T13:13:13.450914Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-10-21T20:15:12.840",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/2708b357440427d6a9fee667eb7b8307f4625adc"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/543d917f691ab06885ee779c862065899eaa4251"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/cdde1560118f82498fc9e9a7c1ef7f0ef7755891"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-401"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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