clk: Fix clk_hw_get_clk() when dev is NULL

{
  "id": "1c6f5052e9c9082dd9a70d386ded8a7306d8d162dd7456660a5b32ce749f7bc5",
  "url": "https://osv.dev/vulnerability/CVE-2022-49187",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "clk: Fix clk_hw_get_clk() when dev is NULL",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: clk: Fix clk_hw_get_clk() when dev is NULL Any registered clk_core structure can have a NULL pointer in its dev field. While never actually documented, this is evidenced by the wide usage of clk_register and clk_hw_register with a NULL device pointer, and the fact that the core of_clk_hw_register() function also passes a NULL device pointer. A call to clk_hw_get_clk() on a clk_hw struct whose clk_core is in that case will result in a NULL pointer derefence when it calls dev_name() on that NULL device pointer. Add a test for this case and use NULL as the dev_id if the device pointer is NULL.",
    "evidence": "osv:CVE-2022-49187",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.15.33",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.16.19",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.17.2",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "CVE-2022-49187",
      "aliases": [
        "CVE-2022-49187"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
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              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
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          "database_specific": {
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        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.11.0"
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                  "fixed": "5.15.33"
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            {
              "type": "ECOSYSTEM",
              "events": [
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                  "introduced": "5.16.0"
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                {
                  "fixed": "5.16.19"
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            {
              "type": "ECOSYSTEM",
              "events": [
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          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49187.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:38.529068023Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/0c1b56df451716ba207bbf59f303473643eee4fd",
        "https://git.kernel.org/stable/c/23f89fe005b105f0dcc55034c13eb89f9b570fac",
        "https://git.kernel.org/stable/c/4be3e4c05d8dd1b83b75652cad88c9e752ec7054",
        "https://git.kernel.org/stable/c/d183f20cf5a7b546d4108e796b98210ceb317579",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49187.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-49187",
        "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-2022-49187.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-49187",
        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 505516,
  "published_at": "2025-02-26T01:55:36.094+00:00"
}