{
  "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-2024-36881",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2024-36881",
    "idYear": 2024,
    "status": "PUBLISHED",
    "publishedAt": "2024-05-30T15:28:52.119Z",
    "updatedAt": "2026-05-23T15:46:59.611Z",
    "importedAt": "2026-10-24T01:57:11.582Z",
    "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": "mm/userfaultfd: reset ptes when close() for wr-protected ones",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/userfaultfd: reset ptes when close() for wr-protected ones\n\nUserfaultfd unregister includes a step to remove wr-protect bits from all\nthe relevant pgtable entries, but that only covered an explicit\nUFFDIO_UNREGISTER ioctl, not a close() on the userfaultfd itself.  Cover\nthat too.  This fixes a WARN trace.\n\nThe only user visible side effect is the user can observe leftover\nwr-protect bits even if the user close()ed on an userfaultfd when\nreleasing the last reference of it.  However hopefully that should be\nharmless, and nothing bad should happen even if so.\n\nThis change is now more important after the recent page-table-check\npatch we merged in mm-unstable (446dd9ad37d0 (\"mm/page_table_check:\nsupport userfault wr-protect entries\")), as we'll do sanity check on\nuffd-wp bits without vma context.  So it's better if we can 100%\nguarantee no uffd-wp bit leftovers, to make sure each report will be\nvalid.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "f369b07c861435bd812a9d14493f71b34132ed6f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "377f3a9a3d032a52325a5b110379a25dd1ab1931"
            },
            {
              "version": "f369b07c861435bd812a9d14493f71b34132ed6f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8d8b68a5b0c9fb23d37df06bb273ead38fd5a29d"
            },
            {
              "version": "f369b07c861435bd812a9d14493f71b34132ed6f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c88033efe9a391e72ba6b5df4b01d6e628f4e734"
            },
            {
              "version": "3e2747c3ddfa717697c3cc2aa6ab989e48d6587d",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "5.19.6",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.20"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.0",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.0"
            },
            {
              "version": "6.6.31",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.8.10",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.8.*"
            },
            {
              "version": "6.9",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}