{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2021-47179",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-47179",
    "idYear": 2021,
    "status": "PUBLISHED",
    "publishedAt": "2024-03-25T09:16:28.787Z",
    "updatedAt": "2026-08-05T08:46:31.594Z",
    "importedAt": "2026-10-24T01:56:36.661Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "NFSv4: Fix a NULL pointer dereference in pnfs_mark_matching_lsegs_return()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFSv4: Fix a NULL pointer dereference in pnfs_mark_matching_lsegs_return()\n\nCommit de144ff4234f changes _pnfs_return_layout() to call\npnfs_mark_matching_lsegs_return() passing NULL as the struct\npnfs_layout_range argument. Unfortunately,\npnfs_mark_matching_lsegs_return() doesn't check if we have a value here\nbefore dereferencing it, causing an oops.\n\nI'm able to hit this crash consistently when running connectathon basic\ntests on NFS v4.1/v4.2 against Ontap.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "80e34f4957ec3010c85f9bb0b568a8d46acdf535",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4e1ba532dbc1a0e19fc2458d74ab8d98680c4e42"
            },
            {
              "version": "7b7b9774643220e53eef58c15bb29bd4182fe053",
              "status": "affected",
              "versionType": "git",
              "lessThan": "42637ca25c7d7b5a92804a679af5192e8c1a9f48"
            },
            {
              "version": "9ffa7967f9379a0a1b924e9ffeda709d72237da7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "39785761feadf261bc5101372b0b0bbaf6a94494"
            },
            {
              "version": "6be0e4b59314e4a836495f6ffdc5d2c5b079deeb",
              "status": "affected",
              "versionType": "git",
              "lessThan": "aba3c7795f51717ae316f3566442dee7cc3eeccb"
            },
            {
              "version": "2fafe7d5047f98791afd9a1d90d2afb70debc590",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f9890652185b72b8de9ebeb4406037640b6e1b53"
            },
            {
              "version": "7e65ea887d0c0997f3053acd91a027af45e71c5b",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b090d110e66636bca473fd8b98d5c97b555a965a"
            },
            {
              "version": "de144ff4234f935bd2150108019b5d87a90a8a96",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a421d218603ffa822a0b8045055c03eae394a7eb"
            },
            {
              "version": "96260bde1ea8ae31a5402fe506abbb8951d5a42c",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "5.11.20",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.12"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "4.9.269",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.9.271"
            },
            {
              "version": "4.14.233",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.14.235"
            },
            {
              "version": "4.19.191",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.19.193"
            },
            {
              "version": "5.4.118",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.4.124"
            },
            {
              "version": "5.10.36",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.10.42"
            },
            {
              "version": "5.12.3",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.12.9"
            }
          ]
        }
      ]
    }
  }
}