cve/rejected/2021/CVE-2021-47213.json

{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFSD: Fix exposure in nfsd4_decode_bitmap()\n\nrtm@csail.mit.edu reports:\n> nfsd4_decode_bitmap4() will write beyond bmval[bmlen-1] if the RPC\n> directs it to do so. This can cause nfsd4_decode_state_protect4_a()\n> to write client-supplied data beyond the end of\n> nfsd4_exchange_id.spo_must_allow[] when called by\n> nfsd4_decode_exchange_id().\n\nRewrite the loops so nfsd4_decode_bitmap() cannot iterate beyond\n@bmlen.\n\nReported by: rtm@csail.mit.edu"
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "versions": [
                  {
                     "version": "d1c263a031e8",
                     "lessThan": "10c22d9519f3",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "d1c263a031e8",
                     "lessThan": "c0019b7db1d7",
                     "status": "affected",
                     "versionType": "git"
                  }
               ]
            },
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "affected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "versions": [
                  {
                     "version": "5.11",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "5.11",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.15.5",
                     "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/10c22d9519f3f5939de61a1500aa3a926b778d3a"
            },
            {
               "url": "https://git.kernel.org/stable/c/c0019b7db1d7ac62c711cda6b357a659d46428fe"
            }
         ],
         "title": "NFSD: Fix exposure in nfsd4_decode_bitmap()",
         "x_generator": {
            "engine": "bippy-d175d3acf727"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2021-47213",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}