CVE-2026-53209 (GCVE-0-2026-53209)

Vulnerability from cvelistv5 – Published: 2026-06-25 08:39 – Updated: 2026-06-28 06:40
VLAI
Title
Bluetooth: hci_sync: reject oversized Broadcast Announcement prepend
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: reject oversized Broadcast Announcement prepend Existing advertising instances can already hold the maximum extended advertising payload. When hci_adv_bcast_annoucement() prepends the Broadcast Announcement service data to that payload, the combined data may no longer fit in the temporary buffer used to rebuild the advertising data. Reject that case before copying the existing payload and report the failure through the device log. This keeps the existing advertising data intact and avoids overrunning the temporary buffer.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 63f365eb4d1668a04070151b555d55a07ede8d4b , < 10b0e832cc05d7aef4b92bed912cbd4a395d0862 (git)
Affected: c621211b308816889f0a3246de448bfcef8ab3ab , < 1338ee049a8910ba6c9cee963920e978e6893c7d (git)
Affected: 907ef6e12fb558a0763e894311eb245a94c192dd , < 02f50e8bb69f9b22516163a09922f5537d3b12d1 (git)
Affected: 5725bc608252050ed8a4d47d59225b7dd73474c8 , < dafc9f57140e66a10945127aa7433c3d715dc253 (git)
Affected: 5725bc608252050ed8a4d47d59225b7dd73474c8 , < cdd8bbdbee763fdf5bf343e6f7d4e79347739f62 (git)
Affected: 5725bc608252050ed8a4d47d59225b7dd73474c8 , < 5c65b96b549ea2dcfde497436bf9e048deb87758 (git)
Affected: 15da883c010cbc2a84aec1738b6ad6ee477846de (git)
Affected: 6.1.142 , < 6.1.176 (semver)
Affected: 6.6.94 , < 6.6.143 (semver)
Affected: 6.12.34 , < 6.12.94 (semver)
Affected: 6.15.3 , < 6.16 (semver)
Create a notification for this product.
Linux Linux Affected: 6.16
Unaffected: 0 , < 6.16 (semver)
Unaffected: 6.1.176 , ≤ 6.1.* (semver)
Unaffected: 6.6.143 , ≤ 6.6.* (semver)
Unaffected: 6.12.94 , ≤ 6.12.* (semver)
Unaffected: 6.18.36 , ≤ 6.18.* (semver)
Unaffected: 7.0.13 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/hci_sync.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "10b0e832cc05d7aef4b92bed912cbd4a395d0862",
              "status": "affected",
              "version": "63f365eb4d1668a04070151b555d55a07ede8d4b",
              "versionType": "git"
            },
            {
              "lessThan": "1338ee049a8910ba6c9cee963920e978e6893c7d",
              "status": "affected",
              "version": "c621211b308816889f0a3246de448bfcef8ab3ab",
              "versionType": "git"
            },
            {
              "lessThan": "02f50e8bb69f9b22516163a09922f5537d3b12d1",
              "status": "affected",
              "version": "907ef6e12fb558a0763e894311eb245a94c192dd",
              "versionType": "git"
            },
            {
              "lessThan": "dafc9f57140e66a10945127aa7433c3d715dc253",
              "status": "affected",
              "version": "5725bc608252050ed8a4d47d59225b7dd73474c8",
              "versionType": "git"
            },
            {
              "lessThan": "cdd8bbdbee763fdf5bf343e6f7d4e79347739f62",
              "status": "affected",
              "version": "5725bc608252050ed8a4d47d59225b7dd73474c8",
              "versionType": "git"
            },
            {
              "lessThan": "5c65b96b549ea2dcfde497436bf9e048deb87758",
              "status": "affected",
              "version": "5725bc608252050ed8a4d47d59225b7dd73474c8",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "15da883c010cbc2a84aec1738b6ad6ee477846de",
              "versionType": "git"
            },
            {
              "lessThan": "6.1.176",
              "status": "affected",
              "version": "6.1.142",
              "versionType": "semver"
            },
            {
              "lessThan": "6.6.143",
              "status": "affected",
              "version": "6.6.94",
              "versionType": "semver"
            },
            {
              "lessThan": "6.12.94",
              "status": "affected",
              "version": "6.12.34",
              "versionType": "semver"
            },
            {
              "lessThan": "6.16",
              "status": "affected",
              "version": "6.15.3",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/hci_sync.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.16"
            },
            {
              "lessThan": "6.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.176",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.143",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.94",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.36",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.176",
                  "versionStartIncluding": "6.1.142",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.143",
                  "versionStartIncluding": "6.6.94",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.94",
                  "versionStartIncluding": "6.12.34",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.36",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.13",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.15.3",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-28T06:40:25.549Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/10b0e832cc05d7aef4b92bed912cbd4a395d0862"
        },
        {
          "url": "https://git.kernel.org/stable/c/1338ee049a8910ba6c9cee963920e978e6893c7d"
        },
        {
          "url": "https://git.kernel.org/stable/c/02f50e8bb69f9b22516163a09922f5537d3b12d1"
        },
        {
          "url": "https://git.kernel.org/stable/c/dafc9f57140e66a10945127aa7433c3d715dc253"
        },
        {
          "url": "https://git.kernel.org/stable/c/cdd8bbdbee763fdf5bf343e6f7d4e79347739f62"
        },
        {
          "url": "https://git.kernel.org/stable/c/5c65b96b549ea2dcfde497436bf9e048deb87758"
        }
      ],
      "title": "Bluetooth: hci_sync: reject oversized Broadcast Announcement prepend",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53209",
    "datePublished": "2026-06-25T08:39:14.915Z",
    "dateReserved": "2026-06-09T07:44:35.391Z",
    "dateUpdated": "2026-06-28T06:40:25.549Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-53209",
      "date": "2026-07-01",
      "epss": "0.00138",
      "percentile": "0.0361"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-53209\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-06-25T09:16:38.490\",\"lastModified\":\"2026-06-30T14:44:27.313\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/bluetooth/hci_sync.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"63f365eb4d1668a04070151b555d55a07ede8d4b\",\"lessThan\":\"10b0e832cc05d7aef4b92bed912cbd4a395d0862\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c621211b308816889f0a3246de448bfcef8ab3ab\",\"lessThan\":\"1338ee049a8910ba6c9cee963920e978e6893c7d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"907ef6e12fb558a0763e894311eb245a94c192dd\",\"lessThan\":\"02f50e8bb69f9b22516163a09922f5537d3b12d1\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5725bc608252050ed8a4d47d59225b7dd73474c8\",\"lessThan\":\"dafc9f57140e66a10945127aa7433c3d715dc253\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5725bc608252050ed8a4d47d59225b7dd73474c8\",\"lessThan\":\"cdd8bbdbee763fdf5bf343e6f7d4e79347739f62\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5725bc608252050ed8a4d47d59225b7dd73474c8\",\"lessThan\":\"5c65b96b549ea2dcfde497436bf9e048deb87758\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"15da883c010cbc2a84aec1738b6ad6ee477846de\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6.1.142\",\"lessThan\":\"6.1.176\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.6.94\",\"lessThan\":\"6.6.143\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.12.34\",\"lessThan\":\"6.12.94\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.15.3\",\"lessThan\":\"6.16\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/bluetooth/hci_sync.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.16\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.16\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.176\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.143\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.94\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.36\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0.13\",\"lessThanOrEqual\":\"7.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/02f50e8bb69f9b22516163a09922f5537d3b12d1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/10b0e832cc05d7aef4b92bed912cbd4a395d0862\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1338ee049a8910ba6c9cee963920e978e6893c7d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5c65b96b549ea2dcfde497436bf9e048deb87758\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cdd8bbdbee763fdf5bf343e6f7d4e79347739f62\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/dafc9f57140e66a10945127aa7433c3d715dc253\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.