CVE-2026-5589

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "packageName": "Zephyr", "product": "Zephyr", "repo": "https://github.com/zephyrproject-rtos/zephyr", "vendor": "zephyrproject-rtos", "versions": [{"lessThan": "4.3.1", "status": "affected", "version": "*", "versionType": "git"}]}], "source": "vulnerabilities@zephyrproject.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:zephyrproject:zephyr:*:*:*:*:*:*:*:*", "matchCriteriaId": "7D912614-A39E-4C9B-AA54-187BC26337B9", "versionEndIncluding": "4.3.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "An integer underflow in bt_mesh_sol_recv() in the Bluetooth Mesh solicitation handling (subsys/bluetooth/mesh/solicitation.c) leads to an out-of-bounds write. When CONFIG_BT_MESH_OD_PRIV_PROXY_SRV is enabled, the function parses solicitation PDUs from raw BLE advertising payloads. The AD parsing loop reads an attacker-controlled length byte (reported_len) and computes reported_len - 3 without checking that reported_len >= 3. When reported_len is less than 3, the subtraction is performed in signed int arithmetic and yields a negative value that bypasses the length guard and is then implicitly converted to a very large size_t when passed to net_buf_simple_pull_mem(). In builds without assertions, this wraps the buffer length and advances the data pointer far out of bounds, so subsequent reads dereference invalid memory. A nearby BLE device can trigger this with a non-connectable advertisement carrying a UUID16 AD structure and a crafted length byte, with no pairing or prior association required, potentially leading to denial of service or arbitrary code execution."}, {"lang": "es", "value": "Un desbordamiento negativo de entero en bt_mesh_sol_recv() en el manejo de solicitudes de Bluetooth Mesh (subsys/bluetooth/mesh/solicitation.c) conduce a una escritura fuera de l\u00edmites. Cuando CONFIG_BT_MESH_OD_PRIV_PROXY_SRV est\u00e1 habilitado, la funci\u00f3n analiza PDUs de solicitud de cargas \u00fatiles de publicidad BLE en bruto. El bucle de an\u00e1lisis de AD lee un byte de longitud controlado por el atacante (reported_len) y calcula reported_len - 3 sin verificar que reported_len >= 3. Cuando reported_len es menor que 3, la resta se realiza en aritm\u00e9tica de enteros con signo y produce un valor negativo que elude la protecci\u00f3n de longitud y luego se convierte impl\u00edcitamente a un size_t muy grande cuando se pasa a net_buf_simple_pull_mem(). En compilaciones sin aserciones, esto envuelve la longitud del b\u00fafer y avanza el puntero de datos mucho m\u00e1s all\u00e1 de los l\u00edmites, por lo que las lecturas posteriores desreferencian memoria no v\u00e1lida. Un dispositivo BLE cercano puede activar esto con un anuncio no conectable que lleva una estructura AD UUID16 y un byte de longitud manipulado, sin necesidad de emparejamiento o asociaci\u00f3n previa, lo que podr\u00eda conducir a denegaci\u00f3n de servicio o ejecuci\u00f3n de c\u00f3digo arbitrario."}], "id": "CVE-2026-5589", "lastModified": "2026-10-15T23:17:37.927", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 6.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.4, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-5589", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-06-05T18:27:34.569513Z", "version": "2.0.3"}}]}, "published": "2026-06-04T20:16:58.540", "references": [{"source": "vulnerabilities@zephyrproject.org", "tags": ["Exploit", "Patch", "Vendor Advisory"], "url": "https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-4pm9-4v7f-x6gr"}], "sourceIdentifier": "vulnerabilities@zephyrproject.org", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-787"}], "source": "vulnerabilities@zephyrproject.org", "type": "Secondary"}]}

{}

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