{
  "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-2025-68179",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-68179",
    "idYear": 2025,
    "status": "PUBLISHED",
    "publishedAt": "2025-12-16T13:42:57.817Z",
    "updatedAt": "2026-08-05T12:10:03.176Z",
    "importedAt": "2026-10-24T01:57:44.935Z",
    "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": "s390: Disable ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390: Disable ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP\n\nAs reported by Luiz Capitulino enabling HVO on s390 leads to reproducible\ncrashes. The problem is that kernel page tables are modified without\nflushing corresponding TLB entries.\n\nEven if it looks like the empty flush_tlb_all() implementation on s390 is\nthe problem, it is actually a different problem: on s390 it is not allowed\nto replace an active/valid page table entry with another valid page table\nentry without the detour over an invalid entry. A direct replacement may\nlead to random crashes and/or data corruption.\n\nIn order to invalidate an entry special instructions have to be used\n(e.g. ipte or idte). Alternatively there are also special instructions\navailable which allow to replace a valid entry with a different valid\nentry (e.g. crdte or cspg).\n\nGiven that the HVO code currently does not provide the hooks to allow for\nan implementation which is compliant with the s390 architecture\nrequirements, disable ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP again, which is\nbasically a revert of the original patch which enabled it.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "00a34d5a99c0631bd780b14cbe3813d0b39c3886",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7088465f10816d9425b95740b37c95f082041d76"
            },
            {
              "version": "00a34d5a99c0631bd780b14cbe3813d0b39c3886",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5e23918e4352288323d13fb511116cdea0234b71"
            },
            {
              "version": "00a34d5a99c0631bd780b14cbe3813d0b39c3886",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d4a8238e5729505b7394ccb007e5dc3e557aa66b"
            },
            {
              "version": "00a34d5a99c0631bd780b14cbe3813d0b39c3886",
              "status": "affected",
              "versionType": "git",
              "lessThan": "64e2f60f355e556337fcffe80b9bcff1b22c9c42"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.2",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.2"
            },
            {
              "version": "6.6.117",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.58",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.17.8",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.17.*"
            },
            {
              "version": "6.18",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}