{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "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."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/acpi/custom_method.c"
               ],
               "versions": [
                  {
                     "version": "4bda2b79a9d0",
                     "lessThan": "1d53ca5d1310",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "5c12dadcbef8",
                     "lessThan": "8b04d57f30ca",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "35b88a10535e",
                     "lessThan": "90575d1d9311",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "e4467fb6ef54",
                     "lessThan": "a5b26a2e362f",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "03d1571d9513",
                     "lessThan": "72814a94c38a",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "03d1571d9513",
                     "lessThan": "62dc2440ebb5",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "03d1571d9513",
                     "lessThan": "f16737caf41f",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "03d1571d9513",
                     "lessThan": "b7a5baaae212",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "03d1571d9513",
                     "lessThan": "e483bb9a991b",
                     "status": "affected",
                     "versionType": "git"
                  }
               ]
            },
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "affected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/acpi/custom_method.c"
               ],
               "versions": [
                  {
                     "version": "5.4",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "5.4",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.4.269",
                     "lessThanOrEqual": "4.4.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.9.269",
                     "lessThanOrEqual": "4.9.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.14.233",
                     "lessThanOrEqual": "4.14.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.19.191",
                     "lessThanOrEqual": "4.19.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.4.118",
                     "lessThanOrEqual": "5.4.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.10.36",
                     "lessThanOrEqual": "5.10.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.11.20",
                     "lessThanOrEqual": "5.11.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.12.3",
                     "lessThanOrEqual": "5.12.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.13",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/1d53ca5d131074c925ce38361fb0376d3bf7e394"
            },
            {
               "url": "https://git.kernel.org/stable/c/8b04d57f30caf76649d0567551589af9a66ca9be"
            },
            {
               "url": "https://git.kernel.org/stable/c/90575d1d9311b753cf1718f4ce9061ddda7dfd23"
            },
            {
               "url": "https://git.kernel.org/stable/c/a5b26a2e362f572d87e9fd35435680e557052a17"
            },
            {
               "url": "https://git.kernel.org/stable/c/72814a94c38a33239793f7622cec6ace1e540c4b"
            },
            {
               "url": "https://git.kernel.org/stable/c/62dc2440ebb552aa0d7f635e1697e077d9d21203"
            },
            {
               "url": "https://git.kernel.org/stable/c/f16737caf41fc06cfe6e49048becb09657074d4b"
            },
            {
               "url": "https://git.kernel.org/stable/c/b7a5baaae212a686ceb812c32fceed79c03c0234"
            },
            {
               "url": "https://git.kernel.org/stable/c/e483bb9a991bdae29a0caa4b3a6d002c968f94aa"
            }
         ],
         "title": "ACPI: custom_method: fix potential use-after-free issue",
         "x_generator": {
            "engine": "bippy-a5840b7849dd"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2021-46966",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}