{
  "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-2026-53209",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-53209",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-06-25T08:39:14.915Z",
    "updatedAt": "2026-10-19T19:57:28.852Z",
    "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": "Bluetooth: hci_sync: reject oversized Broadcast Announcement prepend",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: reject oversized Broadcast Announcement prepend\n\nExisting advertising instances can already hold the maximum extended\nadvertising payload. When hci_adv_bcast_annoucement() prepends the\nBroadcast Announcement service data to that payload, the combined data\nmay no longer fit in the temporary buffer used to rebuild the\nadvertising data.\n\nReject that case before copying the existing payload and report the\nfailure through the device log. This keeps the existing advertising\ndata intact and avoids overrunning the temporary buffer.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "63f365eb4d1668a04070151b555d55a07ede8d4b",
              "status": "affected",
              "versionType": "git",
              "lessThan": "10b0e832cc05d7aef4b92bed912cbd4a395d0862"
            },
            {
              "version": "c621211b308816889f0a3246de448bfcef8ab3ab",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1338ee049a8910ba6c9cee963920e978e6893c7d"
            },
            {
              "version": "907ef6e12fb558a0763e894311eb245a94c192dd",
              "status": "affected",
              "versionType": "git",
              "lessThan": "02f50e8bb69f9b22516163a09922f5537d3b12d1"
            },
            {
              "version": "5725bc608252050ed8a4d47d59225b7dd73474c8",
              "status": "affected",
              "versionType": "git",
              "lessThan": "dafc9f57140e66a10945127aa7433c3d715dc253"
            },
            {
              "version": "5725bc608252050ed8a4d47d59225b7dd73474c8",
              "status": "affected",
              "versionType": "git",
              "lessThan": "cdd8bbdbee763fdf5bf343e6f7d4e79347739f62"
            },
            {
              "version": "5725bc608252050ed8a4d47d59225b7dd73474c8",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5c65b96b549ea2dcfde497436bf9e048deb87758"
            },
            {
              "version": "15da883c010cbc2a84aec1738b6ad6ee477846de",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "6.1.142",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.1.176"
            },
            {
              "version": "6.6.94",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.6.143"
            },
            {
              "version": "6.12.34",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.12.94"
            },
            {
              "version": "6.15.3",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.16"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.16",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.16"
            },
            {
              "version": "6.1.176",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.143",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.94",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.36",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.0.13",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.0.*"
            },
            {
              "version": "7.1",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}