net: mdiobus: fix unbalanced node reference count

{
  "id": "bcac87660a1dd1770c665b3b2109c05564c088bf3ee47ab70900a50e0b7a0969",
  "url": "https://osv.dev/vulnerability/CVE-2022-49016",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "net: mdiobus: fix unbalanced node reference count",
    "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.",
    "evidence": "osv:CVE-2022-49016",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.15.82",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.0.12",
            "evidence": "/affected/1/ranges"
          }
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        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2022-49016",
      "aliases": [
        "CVE-2022-49016"
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      "affected": [
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              "type": "GIT",
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                {
                  "fixed": "543d917f691ab06885ee779c862065899eaa4251"
                },
                {
                  "fixed": "2708b357440427d6a9fee667eb7b8307f4625adc"
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                  "fixed": "cdde1560118f82498fc9e9a7c1ef7f0ef7755891"
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          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.14.0"
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                {
                  "fixed": "5.15.82"
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              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
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                {
                  "fixed": "6.0.12"
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          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49016.json"
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      ],
      "modified": "2026-10-28T02:30:37.403882173Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/2708b357440427d6a9fee667eb7b8307f4625adc",
        "https://git.kernel.org/stable/c/543d917f691ab06885ee779c862065899eaa4251",
        "https://git.kernel.org/stable/c/cdde1560118f82498fc9e9a7c1ef7f0ef7755891",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49016.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-49016",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49016.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-49016",
        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 504594,
  "published_at": "2024-10-21T20:06:25.294+00:00"
}