{
  "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-2021-47259",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-47259",
    "idYear": 2021,
    "status": "PUBLISHED",
    "publishedAt": "2024-05-21T14:19:52.738Z",
    "updatedAt": "2026-08-05T08:47:00.677Z",
    "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": "NFS: Fix use-after-free in nfs4_init_client()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFS: Fix use-after-free in nfs4_init_client()\n\nKASAN reports a use-after-free when attempting to mount two different\nexports through two different NICs that belong to the same server.\n\nOlga was able to hit this with kernels starting somewhere between 5.7\nand 5.10, but I traced the patch that introduced the clear_bit() call to\n4.13. So something must have changed in the refcounting of the clp\npointer to make this call to nfs_put_client() the very last one.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "8dcbec6d20eb881ba368d0aebc3a8a678aebb1da",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c7eab9e2d7b4e983ce280276fb920af649955897"
            },
            {
              "version": "8dcbec6d20eb881ba368d0aebc3a8a678aebb1da",
              "status": "affected",
              "versionType": "git",
              "lessThan": "42c10b0db064e45f5c5ae7019bbf2168ffab766c"
            },
            {
              "version": "8dcbec6d20eb881ba368d0aebc3a8a678aebb1da",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3e3c7ebbfac152d08be75c92802a64a1f6471a15"
            },
            {
              "version": "8dcbec6d20eb881ba368d0aebc3a8a678aebb1da",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c3b6cf64dfe4ef96e7341508d50d6998da7062c7"
            },
            {
              "version": "8dcbec6d20eb881ba368d0aebc3a8a678aebb1da",
              "status": "affected",
              "versionType": "git",
              "lessThan": "72651c6579a25317a90536181d311c663d0329ab"
            },
            {
              "version": "8dcbec6d20eb881ba368d0aebc3a8a678aebb1da",
              "status": "affected",
              "versionType": "git",
              "lessThan": "476bdb04c501fc64bf3b8464ffddefc8dbe01577"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.13",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.13"
            },
            {
              "version": "4.14.237",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.14.*"
            },
            {
              "version": "4.19.195",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.19.*"
            },
            {
              "version": "5.4.126",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.44",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.12.11",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.12.*"
            },
            {
              "version": "5.13",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}