{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmtd: require write permissions for locking and badblock ioctls\n\nMEMLOCK, MEMUNLOCK and OTPLOCK modify protection bits. Thus require\nwrite permission. Depending on the hardware MEMLOCK might even be\nwrite-once, e.g. for SPI-NOR flashes with their WP# tied to GND. OTPLOCK\nis always write-once.\n\nMEMSETBADBLOCK modifies the bad block table."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/mtd/mtdchar.c"
               ],
               "versions": [
                  {
                     "version": "1c9f9125892a",
                     "lessThan": "f4d28d8b9b0e",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "583d42400532",
                     "lessThan": "9625b00cac66",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "389c74c218d3",
                     "lessThan": "f73b29819c63",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "ab1a602a9cea",
                     "lessThan": "75ed985bd6c8",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "9a53e8bd59d9",
                     "lessThan": "5880afefe0cb",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "f7e6b19bc764",
                     "lessThan": "7b6552719c0c",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "f7e6b19bc764",
                     "lessThan": "077259f5e777",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "f7e6b19bc764",
                     "lessThan": "a08799d3e8c8",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "f7e6b19bc764",
                     "lessThan": "1e97743fd180",
                     "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/mtd/mtdchar.c"
               ],
               "versions": [
                  {
                     "version": "5.9",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "5.9",
                     "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": "5.4.119",
                     "lessThanOrEqual": "5.4.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.10.37",
                     "lessThanOrEqual": "5.10.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.11.21",
                     "lessThanOrEqual": "5.11.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.12.4",
                     "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/f4d28d8b9b0e7c4ae04214b8d7e0b0466ec6bcaf"
            },
            {
               "url": "https://git.kernel.org/stable/c/9625b00cac6630479c0ff4b9fafa88bee636e1f0"
            },
            {
               "url": "https://git.kernel.org/stable/c/f73b29819c6314c0ba8b7d5892dfb03487424bee"
            },
            {
               "url": "https://git.kernel.org/stable/c/75ed985bd6c8ac1d4e673e93ea9d96c9908c1d37"
            },
            {
               "url": "https://git.kernel.org/stable/c/5880afefe0cb9b2d5e801816acd58bfe91a96981"
            },
            {
               "url": "https://git.kernel.org/stable/c/7b6552719c0ccbbea29dde4be141da54fdb5877e"
            },
            {
               "url": "https://git.kernel.org/stable/c/077259f5e777c3c8821f6b41dee709fcda27306b"
            },
            {
               "url": "https://git.kernel.org/stable/c/a08799d3e8c8088640956237c183f83463c39668"
            },
            {
               "url": "https://git.kernel.org/stable/c/1e97743fd180981bef5f01402342bb54bf1c6366"
            }
         ],
         "title": "mtd: require write permissions for locking and badblock ioctls",
         "x_generator": {
            "engine": "bippy-a5840b7849dd"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2021-47055",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}