{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxen/blkfront: harden blkfront against event channel storms\n\nThe Xen blkfront driver is still vulnerable for an attack via excessive\nnumber of events sent by the backend. Fix that by using lateeoi event\nchannels.\n\nThis is part of XSA-391"
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/block/xen-blkfront.c"
               ],
               "versions": [
                  {
                     "version": "1da177e4c3f4",
                     "lessThan": "3e04b9e6aa7d",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1da177e4c3f4",
                     "lessThan": "25898389795b",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1da177e4c3f4",
                     "lessThan": "5ac3b68b79c9",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1da177e4c3f4",
                     "lessThan": "269d7124bcfa",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1da177e4c3f4",
                     "lessThan": "4ed9f5c511ce",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1da177e4c3f4",
                     "lessThan": "8ac3b6ee7c9f",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1da177e4c3f4",
                     "lessThan": "caf9b51829a5",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1da177e4c3f4",
                     "lessThan": "0fd08a34e8e3",
                     "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/block/xen-blkfront.c"
               ],
               "versions": [
                  {
                     "version": "4.4.296",
                     "lessThanOrEqual": "4.4.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.9.294",
                     "lessThanOrEqual": "4.9.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.14.259",
                     "lessThanOrEqual": "4.14.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.19.222",
                     "lessThanOrEqual": "4.19.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.4.168",
                     "lessThanOrEqual": "5.4.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.10.88",
                     "lessThanOrEqual": "5.10.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.15.11",
                     "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/3e04b9e6aa7d77287e70a400be83060d2b7b2cfe"
            },
            {
               "url": "https://git.kernel.org/stable/c/25898389795bd85d8e1520c0c75c3ad906c17da7"
            },
            {
               "url": "https://git.kernel.org/stable/c/5ac3b68b79c9e964dd6f3cf80ff825518e502b79"
            },
            {
               "url": "https://git.kernel.org/stable/c/269d7124bcfad2558d2329d0fe603ca20b20d3f4"
            },
            {
               "url": "https://git.kernel.org/stable/c/4ed9f5c511ce95cb8db05ff82026ea901f45fd76"
            },
            {
               "url": "https://git.kernel.org/stable/c/8ac3b6ee7c9ff2df7c99624bb1235e2e55623825"
            },
            {
               "url": "https://git.kernel.org/stable/c/caf9b51829a50590b84daea924a0fd62d32bc952"
            },
            {
               "url": "https://git.kernel.org/stable/c/0fd08a34e8e3b67ec9bd8287ac0facf8374b844a"
            }
         ],
         "title": "xen/blkfront: harden blkfront against event channel storms",
         "x_generator": {
            "engine": "bippy-a5840b7849dd"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2021-47573",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}