CVE-2025-38313 (GCVE-0-2025-38313)
Vulnerability from cvelistv5
Published
2025-07-10 07:42
Modified
2025-07-28 04:18
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
Impacted products
Vendor Product Version
Linux Linux Version: a042fbed02904493ae6df26ec836045f5a7d3ce2
Version: a042fbed02904493ae6df26ec836045f5a7d3ce2
Version: a042fbed02904493ae6df26ec836045f5a7d3ce2
Version: a042fbed02904493ae6df26ec836045f5a7d3ce2
Version: a042fbed02904493ae6df26ec836045f5a7d3ce2
Version: a042fbed02904493ae6df26ec836045f5a7d3ce2
Version: a042fbed02904493ae6df26ec836045f5a7d3ce2
Version: a042fbed02904493ae6df26ec836045f5a7d3ce2
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/bus/fsl-mc/fsl-mc-bus.c"
          ],
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          "vendor": "Linux",
          "versions": [
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              "version": "0",
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              "status": "unaffected",
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            {
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              "version": "5.15.186",
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              "status": "unaffected",
              "version": "6.1.142",
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              "status": "unaffected",
              "version": "6.6.94",
              "versionType": "semver"
            },
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              "version": "6.12.34",
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              "version": "6.15.3",
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            },
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              "version": "6.16",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
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                  "versionStartIncluding": "4.13",
                  "vulnerable": true
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                  "versionEndExcluding": "5.10.239",
                  "versionStartIncluding": "4.13",
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                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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);"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-07-28T04:18:18.573Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/12e4431e5078847791936820bd39df9e1ee26d2e"
        },
        {
          "url": "https://git.kernel.org/stable/c/3135e03a92f6b5259d0a7f25f728e9e7866ede3f"
        },
        {
          "url": "https://git.kernel.org/stable/c/7002b954c4a8b9965ba0f139812ee4a6f71beac8"
        },
        {
          "url": "https://git.kernel.org/stable/c/b2057374f326303c86d8423415ab58656eebc695"
        },
        {
          "url": "https://git.kernel.org/stable/c/4b23c46eb2d88924b93aca647bde9a4b9cf62cf9"
        },
        {
          "url": "https://git.kernel.org/stable/c/1d5baab39e5b09a76870b345cdee7933871b881f"
        },
        {
          "url": "https://git.kernel.org/stable/c/873d47114fd5e5a1cad2018843671537cc71ac84"
        },
        {
          "url": "https://git.kernel.org/stable/c/d694bf8a9acdbd061596f3e7549bc8cb70750a60"
        }
      ],
      "title": "bus: fsl-mc: fix double-free on mc_dev",
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        "engine": "bippy-1.2.0"
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    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38313",
    "datePublished": "2025-07-10T07:42:21.314Z",
    "dateReserved": "2025-04-16T04:51:24.003Z",
    "dateUpdated": "2025-07-28T04:18:18.573Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38313\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-07-10T08:15:30.240\",\"lastModified\":\"2025-07-10T13:17:30.017\",\"vulnStatus\":\"Awaiting Analysis\",\"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);\"}],\"metrics\":{},\"references\":[{\"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\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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