{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: mma8452: Fix trigger reference couting\n\nThe mma8452 driver directly assigns a trigger to the struct iio_dev. The\nIIO core when done using this trigger will call `iio_trigger_put()` to drop\nthe reference count by 1.\n\nWithout the matching `iio_trigger_get()` in the driver the reference count\ncan reach 0 too early, the trigger gets freed while still in use and a\nuse-after-free occurs.\n\nFix this by getting a reference to the trigger before assigning it to the\nIIO device."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/iio/accel/mma8452.c"
               ],
               "versions": [
                  {
                     "version": "ae6d9ce05691",
                     "lessThan": "094d513b78b1",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "ae6d9ce05691",
                     "lessThan": "fb75cc4740d8",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "ae6d9ce05691",
                     "lessThan": "794c0898f6bf",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "ae6d9ce05691",
                     "lessThan": "f5deab10ced3",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "ae6d9ce05691",
                     "lessThan": "acf0088ac073",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "ae6d9ce05691",
                     "lessThan": "db12d9508536",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "ae6d9ce05691",
                     "lessThan": "c43517071dfc",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "ae6d9ce05691",
                     "lessThan": "cd0082235783",
                     "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/iio/accel/mma8452.c"
               ],
               "versions": [
                  {
                     "version": "4.2",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "4.2",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.4.295",
                     "lessThanOrEqual": "4.4.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.9.293",
                     "lessThanOrEqual": "4.9.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.14.258",
                     "lessThanOrEqual": "4.14.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.19.221",
                     "lessThanOrEqual": "4.19.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.4.165",
                     "lessThanOrEqual": "5.4.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.10.85",
                     "lessThanOrEqual": "5.10.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.15.8",
                     "lessThanOrEqual": "5.15.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.16",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/094d513b78b1714113bc016684b8142382e071ba"
            },
            {
               "url": "https://git.kernel.org/stable/c/fb75cc4740d81264cd5bcb0e17d961d018a8be96"
            },
            {
               "url": "https://git.kernel.org/stable/c/794c0898f6bf39a458655d5fb4af70ec43a5cfcb"
            },
            {
               "url": "https://git.kernel.org/stable/c/f5deab10ced368c807866283f8b79144c4823be8"
            },
            {
               "url": "https://git.kernel.org/stable/c/acf0088ac073ca6e7f4cad6acac112177e08df5e"
            },
            {
               "url": "https://git.kernel.org/stable/c/db12d95085367de8b0223929d1332731024441f1"
            },
            {
               "url": "https://git.kernel.org/stable/c/c43517071dfc9fce34f8f69dbb98a86017f6b739"
            },
            {
               "url": "https://git.kernel.org/stable/c/cd0082235783f814241a1c9483fb89e405f4f892"
            }
         ],
         "title": "iio: mma8452: Fix trigger reference couting",
         "x_generator": {
            "engine": "bippy-a5840b7849dd"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2021-47500",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}