cve/published/2021/CVE-2021-47109.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\nneighbour: allow NUD_NOARP entries to be forced GCed\n\nIFF_POINTOPOINT interfaces use NUD_NOARP entries for IPv6. It's possible to\nfill up the neighbour table with enough entries that it will overflow for\nvalid connections after that.\n\nThis behaviour is more prevalent after commit 58956317c8de (\"neighbor:\nImprove garbage collection\") is applied, as it prevents removal from\nentries that are not NUD_FAILED, unless they are more than 5s old."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "net/core/neighbour.c"
               ],
               "versions": [
                  {
                     "version": "58956317c8de52009d1a38a721474c24aef74fe7",
                     "lessThan": "d99029e6aab62aef0a0251588b2867e77e83b137",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "58956317c8de52009d1a38a721474c24aef74fe7",
                     "lessThan": "d17d47da59f726dc4c87caebda3a50333d7e2fd3",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "58956317c8de52009d1a38a721474c24aef74fe7",
                     "lessThan": "ddf088d7aaaaacfc836104f2e632b29b1d383cfc",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "58956317c8de52009d1a38a721474c24aef74fe7",
                     "lessThan": "7a6b1ab7475fd6478eeaf5c9d1163e7a18125c8f",
                     "status": "affected",
                     "versionType": "git"
                  }
               ]
            },
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "affected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "net/core/neighbour.c"
               ],
               "versions": [
                  {
                     "version": "5.0",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "5.0",
                     "status": "unaffected",
                     "versionType": "semver"
                  },
                  {
                     "version": "5.4.125",
                     "lessThanOrEqual": "5.4.*",
                     "status": "unaffected",
                     "versionType": "semver"
                  },
                  {
                     "version": "5.10.43",
                     "lessThanOrEqual": "5.10.*",
                     "status": "unaffected",
                     "versionType": "semver"
                  },
                  {
                     "version": "5.12.10",
                     "lessThanOrEqual": "5.12.*",
                     "status": "unaffected",
                     "versionType": "semver"
                  },
                  {
                     "version": "5.13",
                     "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": "5.0",
                           "versionEndExcluding": "5.4.125"
                        },
                        {
                           "vulnerable": true,
                           "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                           "versionStartIncluding": "5.0",
                           "versionEndExcluding": "5.10.43"
                        },
                        {
                           "vulnerable": true,
                           "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                           "versionStartIncluding": "5.0",
                           "versionEndExcluding": "5.12.10"
                        },
                        {
                           "vulnerable": true,
                           "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                           "versionStartIncluding": "5.0",
                           "versionEndExcluding": "5.13"
                        }
                     ]
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/d99029e6aab62aef0a0251588b2867e77e83b137"
            },
            {
               "url": "https://git.kernel.org/stable/c/d17d47da59f726dc4c87caebda3a50333d7e2fd3"
            },
            {
               "url": "https://git.kernel.org/stable/c/ddf088d7aaaaacfc836104f2e632b29b1d383cfc"
            },
            {
               "url": "https://git.kernel.org/stable/c/7a6b1ab7475fd6478eeaf5c9d1163e7a18125c8f"
            }
         ],
         "title": "neighbour: allow NUD_NOARP entries to be forced GCed",
         "x_generator": {
            "engine": "bippy-1.2.0"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2021-47109",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}