{"id":"CVE-2026-53209","revision":"e191f305f09943d48761aa4babb1a96b","records":[{"revision":"e191f305f09943d48761aa4babb1a96b","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-53209","aliases":[],"title":"Bluetooth: hci_sync: reject oversized Broadcast Announcement prepend","description":"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.","state":0,"publishedAt":"2026-06-25T08:39:14.915+00:00","modifiedAt":"2026-10-19T19:57:28.852+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/bluetooth/hci_sync.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"63f365eb4d1668a04070151b555d55a07ede8d4b\",\n                            \"lessThan\": \"10b0e832cc05d7aef4b92bed912cbd4a395d0862\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c621211b308816889f0a3246de448bfcef8ab3ab\",\n                            \"lessThan\": \"1338ee049a8910ba6c9cee963920e978e6893c7d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"907ef6e12fb558a0763e894311eb245a94c192dd\",\n                            \"lessThan\": \"02f50e8bb69f9b22516163a09922f5537d3b12d1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5725bc608252050ed8a4d47d59225b7dd73474c8\",\n                            \"lessThan\": \"dafc9f57140e66a10945127aa7433c3d715dc253\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5725bc608252050ed8a4d47d59225b7dd73474c8\",\n                            \"lessThan\": \"cdd8bbdbee763fdf5bf343e6f7d4e79347739f62\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5725bc608252050ed8a4d47d59225b7dd73474c8\",\n                            \"lessThan\": \"5c65b96b549ea2dcfde497436bf9e048deb87758\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"15da883c010cbc2a84aec1738b6ad6ee477846de\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6.1.142\",\n                            \"lessThan\": \"6.1.176\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.94\",\n                            \"lessThan\": \"6.6.143\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.34\",\n                            \"lessThan\": \"6.12.94\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.15.3\",\n                            \"lessThan\": \"6.16\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/bluetooth/hci_sync.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.16\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.16\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.176\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.143\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.94\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.36\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0.13\",\n                            \"lessThanOrEqual\": \"7.0.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/10b0e832cc05d7aef4b92bed912cbd4a395d0862","https://git.kernel.org/stable/c/1338ee049a8910ba6c9cee963920e978e6893c7d","https://git.kernel.org/stable/c/02f50e8bb69f9b22516163a09922f5537d3b12d1","https://git.kernel.org/stable/c/dafc9f57140e66a10945127aa7433c3d715dc253","https://git.kernel.org/stable/c/cdd8bbdbee763fdf5bf343e6f7d4e79347739f62","https://git.kernel.org/stable/c/5c65b96b549ea2dcfde497436bf9e048deb87758"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-53209","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-53209","identifiers":["CVE-2026-53209"]},"retained":false,"historicalAffected":[]}],"coverage":[]}