{
  "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-2026-63833",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-63833",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-07-19T12:02:25.469Z",
    "updatedAt": "2026-10-19T20:07:49.624Z",
    "importedAt": "2026-10-24T01:58:20.586Z",
    "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": "ntfs3: reject direct userspace writes to reserved $LX* xattrs",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nntfs3: reject direct userspace writes to reserved $LX* xattrs\n\nNTFS3 uses $LXUID, $LXGID, $LXMOD and $LXDEV as internal WSL\npermission metadata and reloads them into i_uid, i_gid and i_mode\nfrom ntfs_get_wsl_perm().\n\nBecause the empty-prefix xattr handler also lets file owners call\nsetxattr() on these names directly, an unprivileged writer on a\nwritable ntfs3 mount can plant root ownership and S_ISUID on their own\nfile and gain euid 0 after inode reload.\n\nReject direct userspace writes to the reserved $LX* names. Internal\nntfs3 metadata updates are unchanged because ntfs_save_wsl_perm()\nwrites them via ntfs_set_ea() directly.\n\n[almaz.alexandrovich@paragon-software.com: added an additional check for non privileged users]",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "be71b5cba2e6485e8959da7a9f9a44461a1bb074",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e574af95234afc3c725988bbc1fdeb46b9f386a4"
            },
            {
              "version": "be71b5cba2e6485e8959da7a9f9a44461a1bb074",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2c3cd6da4a14380ef79e34bd9dff7caf46687477"
            },
            {
              "version": "be71b5cba2e6485e8959da7a9f9a44461a1bb074",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e8852ae29868e449fdb47eebc28f35fb80741a5f"
            },
            {
              "version": "be71b5cba2e6485e8959da7a9f9a44461a1bb074",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f8d420949b335a4b51d06ab276beee6b8dfdc909"
            },
            {
              "version": "be71b5cba2e6485e8959da7a9f9a44461a1bb074",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5e658b9245a52d838ef93729a7bc07de8e19deb7"
            },
            {
              "version": "be71b5cba2e6485e8959da7a9f9a44461a1bb074",
              "status": "affected",
              "versionType": "git",
              "lessThan": "293a84fa40b3a1b3471c0545722724bc10973f76"
            },
            {
              "version": "be71b5cba2e6485e8959da7a9f9a44461a1bb074",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5b08dccecf825cbf905f348bc6ccb497507e28e2"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.15",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.15"
            },
            {
              "version": "5.15.211",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.177",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.144",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.95",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.38",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.1.3",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "version": "7.2",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}