{"id":"CVE-2026-89583","title":"Bluetooth: eir: Fix OOB read in eir_get_service_data()","summary":"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 …","severity":"high","cvss":8.1,"cvssVector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","cvssSource":"cna","cwe":["CWE-125"],"vendor":"Linux","product":"Linux","affected":["Linux >= 8f9ae5b3ae80f168a6224529e3787f4fb27f299a < b6902adf81ea2ce14b1040dd97b6980050a8125a","Linux >= 8f9ae5b3ae80f168a6224529e3787f4fb27f299a < 1a28aae7f1fc8c06c0d02f153541be4fc7bacb74","Linux >= 8f9ae5b3ae80f168a6224529e3787f4fb27f299a < 815fc98c227a78cbd93d4c29f2833705b7c2bc0f","Linux >= 8f9ae5b3ae80f168a6224529e3787f4fb27f299a < c21fa79301d7d6ac0a4ec6c51e8ba10beaa08c50","Linux >= 8f9ae5b3ae80f168a6224529e3787f4fb27f299a < bb56e97bd67614238c1c0a4084704ccadbb875b4","Linux >= 8f9ae5b3ae80f168a6224529e3787f4fb27f299a < 4beb198bc59b242404a47c21990bc84165052c8a","Linux 5.19"],"published":"2026-09-11","updated":"2026-10-19","sourceUpdated":"2026-10-19T08:49:16.094Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89583","references":[{"url":"https://git.kernel.org/stable/c/b6902adf81ea2ce14b1040dd97b6980050a8125a"},{"url":"https://git.kernel.org/stable/c/1a28aae7f1fc8c06c0d02f153541be4fc7bacb74"},{"url":"https://git.kernel.org/stable/c/815fc98c227a78cbd93d4c29f2833705b7c2bc0f"},{"url":"https://git.kernel.org/stable/c/c21fa79301d7d6ac0a4ec6c51e8ba10beaa08c50"},{"url":"https://git.kernel.org/stable/c/bb56e97bd67614238c1c0a4084704ccadbb875b4"},{"url":"https://git.kernel.org/stable/c/4beb198bc59b242404a47c21990bc84165052c8a"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89583.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89583"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532057"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89583"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89583"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89583.mbox"}],"tags":["cve.org","csaf","vex","red-hat"],"epss":0.00268,"epssPercentile":0.18795,"scores":{"cna":8.1,"vendor":7},"ingestedAt":"2026-09-14T15:23:07.451Z","slug":"CVE-2026-89583","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= 8f9ae5b3ae80f168a6224529e3787f4fb27f299a < b6902adf81ea2ce14b1040dd97b6980050a8125a`\n- `Linux >= 8f9ae5b3ae80f168a6224529e3787f4fb27f299a < 1a28aae7f1fc8c06c0d02f153541be4fc7bacb74`\n- `Linux >= 8f9ae5b3ae80f168a6224529e3787f4fb27f299a < 815fc98c227a78cbd93d4c29f2833705b7c2bc0f`\n- `Linux >= 8f9ae5b3ae80f168a6224529e3787f4fb27f299a < c21fa79301d7d6ac0a4ec6c51e8ba10beaa08c50`\n- `Linux >= 8f9ae5b3ae80f168a6224529e3787f4fb27f299a < bb56e97bd67614238c1c0a4084704ccadbb875b4`\n- `Linux >= 8f9ae5b3ae80f168a6224529e3787f4fb27f299a < 4beb198bc59b242404a47c21990bc84165052c8a`\n- `Linux 5.19`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89583.json)","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":44.6,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":224701,"id":"CVE-2026-89583","ts":1792401478729,"field":"cvss","old":"7","new":"8.1"},{"seq":204187,"id":"CVE-2026-89583","ts":1789490238317,"field":"cvss","old":"8.1","new":"7"},{"seq":197894,"id":"CVE-2026-89583","ts":1789384320845,"field":"cvss","old":"6.8","new":"8.1"},{"seq":197893,"id":"CVE-2026-89583","ts":1789384320845,"field":"severity","old":"medium","new":"high"},{"seq":183739,"id":"CVE-2026-89583","ts":1789356677182,"field":"cvss","old":"8.1","new":"6.8"},{"seq":183738,"id":"CVE-2026-89583","ts":1789356677182,"field":"severity","old":"high","new":"medium"},{"seq":153398,"id":"CVE-2026-89583","ts":1789285350354,"field":"cvss","old":null,"new":"8.1"},{"seq":153397,"id":"CVE-2026-89583","ts":1789285350354,"field":"severity","old":"none","new":"high"},{"seq":109594,"id":"CVE-2026-89583","ts":1789183732549,"field":"cvss","old":null,"new":"6.8"},{"seq":109593,"id":"CVE-2026-89583","ts":1789183732549,"field":"severity","old":"none","new":"medium"}]}