ghsa-vwg2-4h4c-ch44
Vulnerability from github
Published
2025-03-14 21:31
Modified
2025-03-14 21:31
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details

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.

Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2022-49187"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-02-26T07:00:55Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nclk: Fix clk_hw_get_clk() when dev is NULL\n\nAny registered clk_core structure can have a NULL pointer in its dev\nfield. While never actually documented, this is evidenced by the wide\nusage of clk_register and clk_hw_register with a NULL device pointer,\nand the fact that the core of_clk_hw_register() function also passes a\nNULL device pointer.\n\nA call to clk_hw_get_clk() on a clk_hw struct whose clk_core is in that\ncase will result in a NULL pointer derefence when it calls dev_name() on\nthat NULL device pointer.\n\nAdd a test for this case and use NULL as the dev_id if the device\npointer is NULL.",
  "id": "GHSA-vwg2-4h4c-ch44",
  "modified": "2025-03-14T21:31:40Z",
  "published": "2025-03-14T21:31:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49187"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0c1b56df451716ba207bbf59f303473643eee4fd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/23f89fe005b105f0dcc55034c13eb89f9b570fac"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4be3e4c05d8dd1b83b75652cad88c9e752ec7054"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d183f20cf5a7b546d4108e796b98210ceb317579"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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