{"id":"CVE-2026-89583","revision":"7fb45549985e4091aef21122a255ff90","records":[{"revision":"7fb45549985e4091aef21122a255ff90","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-89583","aliases":[],"title":"Bluetooth: eir: Fix OOB read in eir_get_service_data()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: eir: Fix OOB read in eir_get_service_data()\n\neir_get_service_data() walks the advertising data for a Service Data\nfield with a matching UUID.  On a mismatch it advances:\n\n    eir += dlen;\n    eir_len -= dlen;\n\neir_get_data() reports dlen as the field's data length, but the field\nspans dlen + 2 bytes once its length and type bytes count, and more\nwhen non-Service-Data fields were skipped to reach it.  The pointer\nlands correctly on the next field.  eir_len does not, and the shortfall\ncompounds across fields until eir_get_data() reads the length and type\nbytes of a \"field\" past the end of the buffer.\n\nFor an ISO broadcast sink that buffer is hcon->le_per_adv_data[], filled\nfrom the periodic advertising reports of a remote broadcaster.  A PA\npayload packed with mismatching Service Data fields walks off the array\ninto the rest of struct hci_conn.  A drifted field that matches the BAA\nUUID puts those bytes in iso_pi(sk)->base, where user space reads them\nback with getsockopt(BT_ISO_BASE).\n\nRecompute eir_len from the end of the buffer each iteration.","state":0,"publishedAt":"2026-09-11T19:44:49.094+00:00","modifiedAt":"2026-10-19T08:49:16.094+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/eir.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"8f9ae5b3ae80f168a6224529e3787f4fb27f299a\",\n                            \"lessThan\": \"b6902adf81ea2ce14b1040dd97b6980050a8125a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8f9ae5b3ae80f168a6224529e3787f4fb27f299a\",\n                            \"lessThan\": \"1a28aae7f1fc8c06c0d02f153541be4fc7bacb74\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8f9ae5b3ae80f168a6224529e3787f4fb27f299a\",\n                            \"lessThan\": \"815fc98c227a78cbd93d4c29f2833705b7c2bc0f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8f9ae5b3ae80f168a6224529e3787f4fb27f299a\",\n                            \"lessThan\": \"c21fa79301d7d6ac0a4ec6c51e8ba10beaa08c50\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8f9ae5b3ae80f168a6224529e3787f4fb27f299a\",\n                            \"lessThan\": \"bb56e97bd67614238c1c0a4084704ccadbb875b4\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8f9ae5b3ae80f168a6224529e3787f4fb27f299a\",\n                            \"lessThan\": \"4beb198bc59b242404a47c21990bc84165052c8a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\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/eir.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.19\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.19\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.188\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.157\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.109\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.50\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.4\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","score":8.1,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/b6902adf81ea2ce14b1040dd97b6980050a8125a","https://git.kernel.org/stable/c/1a28aae7f1fc8c06c0d02f153541be4fc7bacb74","https://git.kernel.org/stable/c/815fc98c227a78cbd93d4c29f2833705b7c2bc0f","https://git.kernel.org/stable/c/c21fa79301d7d6ac0a4ec6c51e8ba10beaa08c50","https://git.kernel.org/stable/c/bb56e97bd67614238c1c0a4084704ccadbb875b4","https://git.kernel.org/stable/c/4beb198bc59b242404a47c21990bc84165052c8a"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89583","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-89583","identifiers":["CVE-2026-89583"]},"retained":false,"historicalAffected":[]}],"coverage":[]}