{
  "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-2026-63964",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-63964",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-07-19T14:55:53.115Z",
    "updatedAt": "2026-07-20T06:41:45.132Z",
    "importedAt": "2026-10-24T01:58:25.636Z",
    "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": "usb: typec: ucsi: ccg: reject firmware images without a ':' record header",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: ucsi: ccg: reject firmware images without a ':' record header\n\ndo_flash() locates the first .cyacd record with\n\n\tp = strnchr(fw->data, fw->size, ':');\n\twhile (p < eof) {\n\t\ts = strnchr(p + 1, eof - p - 1, ':');\n\t\t...\n\t}\n\nIf the firmware image contains no ':' byte,  strnchr() returns NULL.\nNULL compares less than the valid kernel pointer eof, so the loop body\nruns and strnchr() is called with p + 1 == (void *)1 and a length of\nroughly (unsigned long)eof, causing a wonderful crash.\n\nThe not_signed_fw fallthrough earlier in do_flash() and the chip-state\nbranches in ccg_fw_update_needed() allow an unsigned blob to reach this\nloop, so a root user who can place a crafted file under /lib/firmware\nand write the do_flash sysfs attribute can trigger the oops.\n\nBail out with -EINVAL when the initial strnchr() returns NULL.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "5c9ae5a87573d38cfc4c740aafda2fa6ce06e401",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b41dfc033fe594e152648050e95b9489cd53e9e3"
            },
            {
              "version": "5c9ae5a87573d38cfc4c740aafda2fa6ce06e401",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2f395ca1263bd181995eb829f5943a83a20db213"
            },
            {
              "version": "5c9ae5a87573d38cfc4c740aafda2fa6ce06e401",
              "status": "affected",
              "versionType": "git",
              "lessThan": "6526f8684f72391138353642af908803ba70795e"
            },
            {
              "version": "5c9ae5a87573d38cfc4c740aafda2fa6ce06e401",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3f432b8203066c26770fe6ea591361f10021dd6b"
            },
            {
              "version": "5c9ae5a87573d38cfc4c740aafda2fa6ce06e401",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c4ee519b06389e59ba2d6aa722fcc4a02a8bbcbb"
            },
            {
              "version": "5c9ae5a87573d38cfc4c740aafda2fa6ce06e401",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a38ed87818b2419090fb1a6338ddce6842b65dfa"
            },
            {
              "version": "5c9ae5a87573d38cfc4c740aafda2fa6ce06e401",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c8460de584fe5415d212cfdd127d4db90835a450"
            },
            {
              "version": "5c9ae5a87573d38cfc4c740aafda2fa6ce06e401",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d7486952bf74e546ee3748fb14b2d07881fa6273"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.2",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.2"
            },
            {
              "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": "*"
            }
          ]
        }
      ]
    }
  }
}