{"cve":"CVE-2026-89583","nvd":{"published":"2026-09-11T20:19:42.660","modified":"2026-10-19T09:17:54.420","status":"Received","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.","cvss_v4":null,"cvss_v3":{"version":"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},"cwes":[],"references":["https://git.kernel.org/stable/c/1a28aae7f1fc8c06c0d02f153541be4fc7bacb74","https://git.kernel.org/stable/c/4beb198bc59b242404a47c21990bc84165052c8a","https://git.kernel.org/stable/c/815fc98c227a78cbd93d4c29f2833705b7c2bc0f","https://git.kernel.org/stable/c/b6902adf81ea2ce14b1040dd97b6980050a8125a","https://git.kernel.org/stable/c/bb56e97bd67614238c1c0a4084704ccadbb875b4"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:53:43.293028046+00:00"},"epss":{"cve":"CVE-2026-89583","score":0.00268,"percentile":0.18718,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}