fkie_cve-2025-38313
Vulnerability from fkie_nvd
Published
2025-07-10 08:15
Modified
2025-07-10 13:17
Severity ?
Summary
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);
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/12e4431e5078847791936820bd39df9e1ee26d2e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1d5baab39e5b09a76870b345cdee7933871b881f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3135e03a92f6b5259d0a7f25f728e9e7866ede3f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4b23c46eb2d88924b93aca647bde9a4b9cf62cf9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7002b954c4a8b9965ba0f139812ee4a6f71beac8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/873d47114fd5e5a1cad2018843671537cc71ac84
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b2057374f326303c86d8423415ab58656eebc695
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d694bf8a9acdbd061596f3e7549bc8cb70750a60
Impacted products
Vendor Product Version


To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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);"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bus: fsl-mc: correcci\u00f3n de doble liberaci\u00f3n en mc_dev La confirmaci\u00f3n criticada intent\u00f3 simplificar c\u00f3mo se realizan las desasignaciones pero, en el proceso, introdujo una doble liberaci\u00f3n en la variable mc_dev. En caso de que el dispositivo MC sea un DPRC, se asigna un nuevo mc_bus y la variable mc_dev es solo una referencia a uno de sus campos. En esta circunstancia, en la ruta de error solo se debe liberar mc_bus. Esta confirmaci\u00f3n introduce de nuevo la siguiente advertencia checkpatch que es un falso positivo. ADVERTENCIA: kfree(NULL) es seguro y esta comprobaci\u00f3n probablemente no sea necesaria + if (mc_bus) + kfree(mc_bus);"
    }
  ],
  "id": "CVE-2025-38313",
  "lastModified": "2025-07-10T13:17:30.017",
  "metrics": {},
  "published": "2025-07-10T08:15:30.240",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/12e4431e5078847791936820bd39df9e1ee26d2e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1d5baab39e5b09a76870b345cdee7933871b881f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3135e03a92f6b5259d0a7f25f728e9e7866ede3f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4b23c46eb2d88924b93aca647bde9a4b9cf62cf9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7002b954c4a8b9965ba0f139812ee4a6f71beac8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/873d47114fd5e5a1cad2018843671537cc71ac84"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b2057374f326303c86d8423415ab58656eebc695"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d694bf8a9acdbd061596f3e7549bc8cb70750a60"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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