{
  "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-2026-98164",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-98164",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-29T12:02:12.574Z",
    "updatedAt": "2026-10-07T06:49:16.773Z",
    "importedAt": "2026-10-24T01:58:41.756Z",
    "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": "KVM: x86/mmu: Check write tracking in all address spaces",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: x86/mmu: Check write tracking in all address spaces\n\nkvm_gfn_is_write_tracked() checks only the supplied memslot, but page\ntracking is per-address-space and shadow pages are shared across all\naddress spaces.  With SMM, a GFN can therefore be write-tracked in one\naddress space and appear untracked through the other.\n\nCheck the supplied slot first, then the slot for the other address space.\nThis ensures all callers honor write tracking regardless of the active\naddress space.  In particular, it prevents mmu_try_to_unsync_pages() from\nmarking an upper-level shadow page unsync and eventually triggering the\nBUG in pte_list_remove().\n\n[invert direction of the conditional. - Paolo]",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "699023e239658e62da6f42f47d31b54788521ec1",
              "status": "affected",
              "versionType": "git",
              "lessThan": "09aa68552d2542cc6c23edd1568ac265dc5d886f"
            },
            {
              "version": "699023e239658e62da6f42f47d31b54788521ec1",
              "status": "affected",
              "versionType": "git",
              "lessThan": "429b6f43b4d8c98988fdca99e02dc156134e3d77"
            },
            {
              "version": "699023e239658e62da6f42f47d31b54788521ec1",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d8636c8f9f95d0fd1e2f6f1cad0d5757aa6f212a"
            },
            {
              "version": "699023e239658e62da6f42f47d31b54788521ec1",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c0a9bd5fca0b5f2dea32b0fc31350e71e8648112"
            },
            {
              "version": "699023e239658e62da6f42f47d31b54788521ec1",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ec8fcaf354c1cbb36755d48e9f5a00c9591349e5"
            },
            {
              "version": "699023e239658e62da6f42f47d31b54788521ec1",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0f38453cdb2e17566ccb7c0f3dabd5bd21caca26"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.2",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.2"
            },
            {
              "version": "6.1.187",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.156",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.108",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.49",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.1.13",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "version": "7.2",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}