{
  "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-2026-46318",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-46318",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-06-09T12:11:11.181Z",
    "updatedAt": "2026-06-14T18:08:52.009Z",
    "importedAt": "2026-10-24T01:58:14.884Z",
    "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": "Revert \"mm/hugetlbfs: update hugetlbfs to use mmap_prepare\"",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nRevert \"mm/hugetlbfs: update hugetlbfs to use mmap_prepare\"\n\nThis reverts commit ea52cb24cd3f (\"mm/hugetlbfs: update hugetlbfs to use\nmmap_prepare\") with conflict resolution to account for changes in commit\nea52cb24cd3f (\"mm/hugetlbfs: update hugetlbfs to use mmap_prepare\").\n\nThe patch incorrectly handled hugetlb VMA lock allocation at the\nmmap_prepare stage, where a failed allocation occurring after mmap_prepare\nis called might result in the lock leaking.\n\nThere is no risk of a merge causing a similar issues, as\nVMA_DONTEXPAND_BIT is set for hugetlb mappings.\n\nAs a first step in addressing this issue, simply revert the change so we\ncan rework how we do this having corrected the underlying issues.\n\nWe maintain the VMA flags changes as best we can, accounting for the fact\nthat we were working with a VMA descriptor previously and propagating\nlike-for-like changes for this.\n\nNote that we invoke vma_set_flags() and do not call vma_start_write() as\nvm_flags_set() does.  This is OK as it's being done in an .mmap hook where\nthe VMA is not yet linked into the tree so nobody else can be accessing\nit.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "ea52cb24cd3fb121283754ab82b2cb3044609359",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3af5fc3f0ac98c624c109c8c0796fa46e814344c"
            },
            {
              "version": "ea52cb24cd3fb121283754ab82b2cb3044609359",
              "status": "affected",
              "versionType": "git",
              "lessThan": "83f9efcce93f8574be2279090ee2aec58b86cda7"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.19",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.19"
            },
            {
              "version": "7.0.12",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.0.*"
            },
            {
              "version": "7.1",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}