cve/published/2021/CVE-2021-46952.json

{
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      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFS: fs_context: validate UDP retrans to prevent shift out-of-bounds\n\nFix shift out-of-bounds in xprt_calc_majortimeo(). This is caused\nby a garbage timeout (retrans) mount option being passed to nfs mount,\nin this case from syzkaller.\n\nIf the protocol is XPRT_TRANSPORT_UDP, then 'retrans' is a shift\nvalue for a 64-bit long integer, so 'retrans' cannot be >= 64.\nIf it is >= 64, fail the mount and return an error."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "fs/nfs/fs_context.c"
               ],
               "versions": [
                  {
                     "version": "9954bf92c0cddd50a2a470be302e1c1ffdf21d42",
                     "lessThan": "96fa26b74cdcf9f5c98996bf36bec9fb5b19ffe2",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "9954bf92c0cddd50a2a470be302e1c1ffdf21d42",
                     "lessThan": "2f3380121d49e829fb73ba86240c181bc32ad897",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "9954bf92c0cddd50a2a470be302e1c1ffdf21d42",
                     "lessThan": "3d0163821c035040a46d816a42c0780f0f0a30a8",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "9954bf92c0cddd50a2a470be302e1c1ffdf21d42",
                     "lessThan": "c09f11ef35955785f92369e25819bf0629df2e59",
                     "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/nfs/fs_context.c"
               ],
               "versions": [
                  {
                     "version": "5.6",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "5.6",
                     "status": "unaffected",
                     "versionType": "semver"
                  },
                  {
                     "version": "5.10.36",
                     "lessThanOrEqual": "5.10.*",
                     "status": "unaffected",
                     "versionType": "semver"
                  },
                  {
                     "version": "5.11.20",
                     "lessThanOrEqual": "5.11.*",
                     "status": "unaffected",
                     "versionType": "semver"
                  },
                  {
                     "version": "5.12.3",
                     "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": "5.6",
                           "versionEndExcluding": "5.10.36"
                        },
                        {
                           "vulnerable": true,
                           "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                           "versionStartIncluding": "5.6",
                           "versionEndExcluding": "5.11.20"
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                        {
                           "vulnerable": true,
                           "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                           "versionStartIncluding": "5.6",
                           "versionEndExcluding": "5.12.3"
                        },
                        {
                           "vulnerable": true,
                           "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                           "versionStartIncluding": "5.6",
                           "versionEndExcluding": "5.13"
                        }
                     ]
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         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/96fa26b74cdcf9f5c98996bf36bec9fb5b19ffe2"
            },
            {
               "url": "https://git.kernel.org/stable/c/2f3380121d49e829fb73ba86240c181bc32ad897"
            },
            {
               "url": "https://git.kernel.org/stable/c/3d0163821c035040a46d816a42c0780f0f0a30a8"
            },
            {
               "url": "https://git.kernel.org/stable/c/c09f11ef35955785f92369e25819bf0629df2e59"
            }
         ],
         "title": "NFS: fs_context: validate UDP retrans to prevent shift out-of-bounds",
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   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2021-46952",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}