ghsa-g943-c7gq-998h
Vulnerability from github
Published
2025-07-10 09:32
Modified
2025-07-10 09:32
Details

In the Linux kernel, the following vulnerability has been resolved:

bus: fsl-mc: fix double-free on mc_dev

The blamed commit tried to simplify how the deallocations are done but, in the process, introduced a double-free on the mc_dev variable.

In case the MC device is a DPRC, a new mc_bus is allocated and the mc_dev variable is just a reference to one of its fields. In this circumstance, on the error path only the mc_bus should be freed.

This commit introduces back the following checkpatch warning which is a false-positive.

WARNING: kfree(NULL) is safe and this check is probably not required + if (mc_bus) + kfree(mc_bus);

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{
  "affected": [],
  "aliases": [
    "CVE-2025-38313"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-07-10T08:15:30Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbus: fsl-mc: fix double-free on mc_dev\n\nThe blamed commit tried to simplify how the deallocations are done but,\nin the process, introduced a double-free on the mc_dev variable.\n\nIn case the MC device is a DPRC, a new mc_bus is allocated and the\nmc_dev variable is just a reference to one of its fields. In this\ncircumstance, on the error path only the mc_bus should be freed.\n\nThis commit introduces back the following checkpatch warning which is a\nfalse-positive.\n\nWARNING: kfree(NULL) is safe and this check is probably not required\n+       if (mc_bus)\n+               kfree(mc_bus);",
  "id": "GHSA-g943-c7gq-998h",
  "modified": "2025-07-10T09:32:30Z",
  "published": "2025-07-10T09:32:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38313"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/12e4431e5078847791936820bd39df9e1ee26d2e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1d5baab39e5b09a76870b345cdee7933871b881f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3135e03a92f6b5259d0a7f25f728e9e7866ede3f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4b23c46eb2d88924b93aca647bde9a4b9cf62cf9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7002b954c4a8b9965ba0f139812ee4a6f71beac8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/873d47114fd5e5a1cad2018843671537cc71ac84"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b2057374f326303c86d8423415ab58656eebc695"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d694bf8a9acdbd061596f3e7549bc8cb70750a60"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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