{
  "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-2026-90199",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-90199",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-17T16:07:17.550Z",
    "updatedAt": "2026-10-19T08:59:35.489Z",
    "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: reject out-of-range evcn in mi_enum_attr()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: reject out-of-range evcn in mi_enum_attr()\n\nIn mi_enum_attr(), the start/end VCN validation for non-resident\nattributes is:\n\n\tif (svcn > evcn + 1) goto out;\n\nWhen evcn is U64_MAX the \"evcn + 1\" expression wraps to 0 and any svcn\npasses the check. For evcn values close to U64_MAX (but not equal to it)\nthe right-hand side is still a meaningless near-wrap upper bound, so a\nmalformed on-disk attribute with svcn == 0 and evcn near U64_MAX can pass\nmi_enum_attr() unrejected.\n\nVCN (virtual cluster number) is a cluster index, so any valid evcn is\nbounded by the volume's total cluster count, which ntfs3 holds in\nsbi->used.bitmap.nbits (set up in ntfs_init_from_boot() before any caller\nof mi_enum_attr() runs). Reject evcn values that fall outside this range.\n\nHowever, an empty non-resident attribute (no allocated clusters) is\nlegitimately encoded with svcn == 0 and evcn == -1 (U64_MAX), e.g. via\nattr->nres.evcn = cpu_to_le64((u64)vcn - 1) with vcn == 0. That sentinel\nmust keep passing, so exclude evcn == U64_MAX from the range check. The\nexisting \"svcn > evcn + 1\" test still tolerates the sentinel (\"0 > 0\" is\nfalse) and continues to require svcn == 0 for it, while the range check\nrejects every other out-of-range evcn and thereby also defuses the\n\"evcn + 1\" wraparound.\n\nsvcn does not need its own bound: once evcn < nbits, \"svcn > evcn + 1\"\nimplies svcn <= nbits.\n\n[almaz.alexandrovich@paragon-software.com: fixed evcn check]",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "013ff63b649475f0ee134e2c8d0c8e65284ede50",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0441e34ce098c19185a7b52c5b8b89a8a5b26888"
            },
            {
              "version": "013ff63b649475f0ee134e2c8d0c8e65284ede50",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7ab69cef49ebdfee288287d62641b24ab1445ecc"
            },
            {
              "version": "013ff63b649475f0ee134e2c8d0c8e65284ede50",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ce9a619c432b9a4044fee115c5483fbed946c131"
            },
            {
              "version": "013ff63b649475f0ee134e2c8d0c8e65284ede50",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2b9a0e57bfd365e2096706b19ae34dce3b4a884b"
            },
            {
              "version": "013ff63b649475f0ee134e2c8d0c8e65284ede50",
              "status": "affected",
              "versionType": "git",
              "lessThan": "20fd9f64c0050658f2031e6bd5d552c6f0c8f7e3"
            },
            {
              "version": "a7accf181a4709a6e380360372150cc4a1b6b89a",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "3dfd727873c3e8da74a2e3907120ff052c5f0bcc",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "1d7dd485108d4f633b543c9c14071cc325b68ae5",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "5.15.209",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.16"
            },
            {
              "version": "6.1.115",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.2"
            },
            {
              "version": "6.5.11",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.6"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.6",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.6"
            },
            {
              "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": "*"
            }
          ]
        }
      ]
    }
  }
}