{
  "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-2026-89683",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-89683",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-11T19:46:05.635Z",
    "updatedAt": "2026-10-19T08:50:56.607Z",
    "importedAt": "2026-10-24T01:58:35.090Z",
    "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": "nfsd: fix dentry ref leak on V4ROOT export filehandle lookup",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: fix dentry ref leak on V4ROOT export filehandle lookup\n\nnfsd_set_fh_dentry() leaks the dentry reference from\nexportfs_decode_fh_raw() when the NFS3_FHSIZE or NFS_FHSIZE\nswitch cases detect NFSEXP_V4ROOT and goto out. The out: label\ncalls exp_put() but never dput(dentry), and fhp->fh_dentry was\nnever assigned so fh_put() cannot compensate.\n\nA crafted NFSv3 filehandle targeting a V4ROOT export's fsid\ntriggers the leak on every request.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "ef7f6c4904d03ccd7478e1ac20ed75f79c4ac444",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d493cf57f4c4dae5396cd6ad41e5c209d0615a81"
            },
            {
              "version": "ef7f6c4904d03ccd7478e1ac20ed75f79c4ac444",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c1ae0f973bcba5730871e35976a0ab6878fdac34"
            },
            {
              "version": "ef7f6c4904d03ccd7478e1ac20ed75f79c4ac444",
              "status": "affected",
              "versionType": "git",
              "lessThan": "11db8df188b34bdb8c6a3a0bf438e5fc8cd75aca"
            },
            {
              "version": "ef7f6c4904d03ccd7478e1ac20ed75f79c4ac444",
              "status": "affected",
              "versionType": "git",
              "lessThan": "6247023fbbec1325029f2d5f2a7cdc0f9f9ea15a"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.12",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.12"
            },
            {
              "version": "6.12.109",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.50",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.2.4",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "version": "7.3",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}