{
  "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-2026-90200",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-90200",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-17T16:07:18.182Z",
    "updatedAt": "2026-10-19T08:59:36.427Z",
    "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": "fs/ntfs3: fix integer overflow in MFT cluster validation",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: fix integer overflow in MFT cluster validation\n\nIn ntfs_init_from_boot(), the boot sector's MFT cluster numbers are\nvalidated against the volume size with:\n\n\tif (mlcn  * sct_per_clst >= sectors ||\n\t    mlcn2 * sct_per_clst >= sectors)\n\t\tgoto out;\n\nmlcn and mlcn2 are u64 fields read directly from the boot sector.\nsct_per_clst is bounded above by 4096 (true_sectors_per_clst() plus\nthe is_power_of_2() check below it), but the multiplication is done\nin u64 and wraps when mlcn (or mlcn2) is large enough -- e.g. mlcn\nnear 2^62 with sct_per_clst == 4 wraps to 0, which compares below\nany non-zero 'sectors', so the check is bypassed and the malformed\nrecord is accepted.\n\nThe accepted mlcn is then used unchanged in\n\n\tsbi->mft.lbo = mlcn << cluster_bits;\n\nIn practice the resulting reads fail at the block layer (sb_bread()\nreturns NULL via grow_buffers()'s check_mul_overflow() guard), so\ntoday this manifests as mount failing in odd places rather than as\nsomething more dangerous, but the validation step is still wrong\nand there is no reason for callers to rely on the block layer to\ncatch a value that should never have been accepted in the first\nplace.\n\nUse check_mul_overflow() to compute the two sector positions and\nfail the mount if either multiplication wraps; this preserves the\nexisting semantics (mlcn * sct_per_clst >= sectors) instead of\nswitching to division (mlcn >= sectors / sct_per_clst), which\nwould tighten the check at edge cases where 'sectors' is not a\nmultiple of sct_per_clst.  The check_*_overflow() style is the\none ntfs3 already uses for similar on-disk arithmetic in\nfs/ntfs3/run.c.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "82cae269cfa953032fbb8980a7d554d60fb00b17",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f77a8d9fdf58e298b36564a44c27fadc617bdd28"
            },
            {
              "version": "82cae269cfa953032fbb8980a7d554d60fb00b17",
              "status": "affected",
              "versionType": "git",
              "lessThan": "805cc5554b13d045dce9b03c13eaf015418739fd"
            },
            {
              "version": "82cae269cfa953032fbb8980a7d554d60fb00b17",
              "status": "affected",
              "versionType": "git",
              "lessThan": "dc6d85de7e2656e56e10ff5ba514f2583a4f612b"
            },
            {
              "version": "82cae269cfa953032fbb8980a7d554d60fb00b17",
              "status": "affected",
              "versionType": "git",
              "lessThan": "169383d8914b8fe03464a83540b5b6de3e7831af"
            },
            {
              "version": "82cae269cfa953032fbb8980a7d554d60fb00b17",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c510c63873103a5da6a498fe537bdb5d6f8d03a2"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.15",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.15"
            },
            {
              "version": "6.6.157",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.110",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.52",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.2.6",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "version": "7.3",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}