gsd-2021-46966
Vulnerability from gsd
Modified
2024-02-28 06:03
Details
In the Linux kernel, the following vulnerability has been resolved: ACPI: custom_method: fix potential use-after-free issue In cm_write(), buf is always freed when reaching the end of the function. If the requested count is less than table.length, the allocated buffer will be freed but subsequent calls to cm_write() will still try to access it. Remove the unconditional kfree(buf) at the end of the function and set the buf to NULL in the -EINVAL error path to match the rest of function.
Aliases


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{
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-46966"
      ],
      "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nACPI: custom_method: fix potential use-after-free issue\n\nIn cm_write(), buf is always freed when reaching the end of the\nfunction.  If the requested count is less than table.length, the\nallocated buffer will be freed but subsequent calls to cm_write() will\nstill try to access it.\n\nRemove the unconditional kfree(buf) at the end of the function and\nset the buf to NULL in the -EINVAL error path to match the rest of\nfunction.",
      "id": "GSD-2021-46966",
      "modified": "2024-02-28T06:03:57.650682Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "cve@kernel.org",
        "ID": "CVE-2021-46966",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
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                    "product_name": "Linux",
                    "version": {
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                          "version_name": "03d1571d9513",
                          "version_value": "72814a94c38a"
                        },
                        {
                          "version_value": "not down converted",
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                                "version": "5.4"
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                              {
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                                "version": "4.4.269",
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                                "version": "5.11.20",
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                                "lessThanOrEqual": "5.12.*",
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                                "version": "5.12.3",
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                              {
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      "description": {
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nACPI: custom_method: fix potential use-after-free issue\n\nIn cm_write(), buf is always freed when reaching the end of the\nfunction.  If the requested count is less than table.length, the\nallocated buffer will be freed but subsequent calls to cm_write() will\nstill try to access it.\n\nRemove the unconditional kfree(buf) at the end of the function and\nset the buf to NULL in the -EINVAL error path to match the rest of\nfunction."
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            "url": "https://git.kernel.org/stable/c/1d53ca5d131074c925ce38361fb0376d3bf7e394"
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            "name": "https://git.kernel.org/stable/c/62dc2440ebb552aa0d7f635e1697e077d9d21203",
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            "url": "https://git.kernel.org/stable/c/62dc2440ebb552aa0d7f635e1697e077d9d21203"
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            "url": "https://git.kernel.org/stable/c/f16737caf41fc06cfe6e49048becb09657074d4b"
          },
          {
            "name": "https://git.kernel.org/stable/c/b7a5baaae212a686ceb812c32fceed79c03c0234",
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            "url": "https://git.kernel.org/stable/c/b7a5baaae212a686ceb812c32fceed79c03c0234"
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      }
    },
    "nvd.nist.gov": {
      "cve": {
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nACPI: custom_method: fix potential use-after-free issue\n\nIn cm_write(), buf is always freed when reaching the end of the\nfunction.  If the requested count is less than table.length, the\nallocated buffer will be freed but subsequent calls to cm_write() will\nstill try to access it.\n\nRemove the unconditional kfree(buf) at the end of the function and\nset the buf to NULL in the -EINVAL error path to match the rest of\nfunction."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ACPI: custom_method: soluciona un posible problema de use-after-free En cm_write(), buf siempre se libera al llegar al final de la funci\u00f3n. Si el recuento solicitado es menor que table.length, el b\u00fafer asignado se liberar\u00e1, pero las llamadas posteriores a cm_write() seguir\u00e1n intentando acceder a \u00e9l. Elimine el kfree(buf) incondicional al final de la funci\u00f3n y establezca el buf en NULL en la ruta de error -EINVAL para que coincida con el resto de la funci\u00f3n."
          }
        ],
        "id": "CVE-2021-46966",
        "lastModified": "2024-02-28T14:06:45.783",
        "metrics": {},
        "published": "2024-02-27T19:04:07.127",
        "references": [
          {
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          },
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            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Awaiting Analysis"
      }
    }
  }
}


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