cve/published/2021/CVE-2021-47316.json

{
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      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
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         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: fix NULL dereference in nfs3svc_encode_getaclres\n\nIn error cases the dentry may be NULL.\n\nBefore 20798dfe249a, the encoder also checked dentry and\nd_really_is_positive(dentry), but that looks like overkill to me--zero\nstatus should be enough to guarantee a positive dentry.\n\nThis isn't the first time we've seen an error-case NULL dereference\nhidden in the initialization of a local variable in an xdr encoder.  But\nI went back through the other recent rewrites and didn't spot any\nsimilar bugs."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "fs/nfsd/nfs3acl.c"
               ],
               "versions": [
                  {
                     "version": "d505e66191072748620fc0af038cea4e4da0e3cd",
                     "lessThan": "e79057d15d96ef19de4de6d7e479bae3d58a2a8d",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "20798dfe249a01ad1b12eec7dbc572db5003244a",
                     "lessThan": "650e6f383a6eb40f7c0a010982a74ab4b6893870",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "20798dfe249a01ad1b12eec7dbc572db5003244a",
                     "lessThan": "ab1016d39cc052064e32f25ad18ef8767a0ee3b8",
                     "status": "affected",
                     "versionType": "git"
                  }
               ]
            },
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "affected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "fs/nfsd/nfs3acl.c"
               ],
               "versions": [
                  {
                     "version": "5.13",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "5.13",
                     "status": "unaffected",
                     "versionType": "semver"
                  },
                  {
                     "version": "5.13.4",
                     "lessThanOrEqual": "5.13.*",
                     "status": "unaffected",
                     "versionType": "semver"
                  },
                  {
                     "version": "5.14",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "cpeApplicability": [
            {
               "nodes": [
                  {
                     "operator": "OR",
                     "negate": false,
                     "cpeMatch": [
                        {
                           "vulnerable": true,
                           "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                           "versionStartIncluding": "5.13",
                           "versionEndExcluding": "5.13.4"
                        },
                        {
                           "vulnerable": true,
                           "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                           "versionStartIncluding": "5.13",
                           "versionEndExcluding": "5.14"
                        }
                     ]
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/e79057d15d96ef19de4de6d7e479bae3d58a2a8d"
            },
            {
               "url": "https://git.kernel.org/stable/c/650e6f383a6eb40f7c0a010982a74ab4b6893870"
            },
            {
               "url": "https://git.kernel.org/stable/c/ab1016d39cc052064e32f25ad18ef8767a0ee3b8"
            }
         ],
         "title": "nfsd: fix NULL dereference in nfs3svc_encode_getaclres",
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            "engine": "bippy-1.2.0"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2021-47316",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}