{
  "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-2026-63893",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-63893",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-07-19T14:55:04.288Z",
    "updatedAt": "2026-10-19T20:17:55.146Z",
    "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": "thunderbolt: property: Reject u32 wrap in tb_property_entry_valid()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nthunderbolt: property: Reject u32 wrap in tb_property_entry_valid()\n\nentry->value is u32 and entry->length is u16; the sum is performed in\nu32 and wraps.  A malicious XDomain peer can pick\nvalue = 0xffffff00, length = 0x100 so the sum 0x100000000 wraps to 0\nand passes the > block_len check.  tb_property_parse() then passes\nentry->value to parse_dwdata() as a dword offset into the property\nblock, reading attacker-directed memory far past the allocation.\n\nFor TEXT-typed entries with the \"deviceid\" or \"vendorid\" keys this\nlands in xd->device_name / xd->vendor_name and is readable back via\nthe per-XDomain device_name / vendor_name sysfs attributes; the leak\nis NUL-bounded (kstrdup() stops at the first zero byte) and\nuntargeted (the attacker picks a delta, not an absolute address).\nDATA-typed entries are parsed into property->value.data but not\ngenerically surfaced to userspace.\n\nUse check_add_overflow() so a wrapped sum is rejected.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "cdae7c07e3e3509eaabc18c1640a55dc5b99c179",
              "status": "affected",
              "versionType": "git",
              "lessThan": "6a63623621639acbb39bc2d9fb09559681716695"
            },
            {
              "version": "cdae7c07e3e3509eaabc18c1640a55dc5b99c179",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e8a0b0a93a6ef958e70b1dd4930beb6dc0026b36"
            },
            {
              "version": "cdae7c07e3e3509eaabc18c1640a55dc5b99c179",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9fee50c4e1e42f6d3cbe30df584f9f648f626071"
            },
            {
              "version": "cdae7c07e3e3509eaabc18c1640a55dc5b99c179",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8d4a758b407ab3de3be86d1ceadfa35d717d30c7"
            },
            {
              "version": "cdae7c07e3e3509eaabc18c1640a55dc5b99c179",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5c06a3043ad944f087bb2ae0aae28d820bb9f460"
            },
            {
              "version": "cdae7c07e3e3509eaabc18c1640a55dc5b99c179",
              "status": "affected",
              "versionType": "git",
              "lessThan": "31b98e503ecca8077e5247253dd5425ab84bc96d"
            },
            {
              "version": "cdae7c07e3e3509eaabc18c1640a55dc5b99c179",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a47784aee77f33f786dc5d7375db821bdae68792"
            },
            {
              "version": "cdae7c07e3e3509eaabc18c1640a55dc5b99c179",
              "status": "affected",
              "versionType": "git",
              "lessThan": "01deda0152066c6c955f0619114ea6afa070aaec"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.15",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.15"
            },
            {
              "version": "5.10.259",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.210",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.176",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.143",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.93",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.35",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.0.12",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.0.*"
            },
            {
              "version": "7.1",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}