CVE-2026-5067

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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": "3.7.0", "versionType": "git"}]}], "source": "vulnerabilities@zephyrproject.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:zephyrproject:zephyr:*:*:*:*:*:*:*:*", "matchCriteriaId": "D6DCCDB1-3B65-4C26-8AE2-05613439A5BF", "versionEndIncluding": "4.3.0", "versionStartIncluding": "3.7.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A remote, unauthenticated attacker can trigger memory corruption in Zephyr's HTTP server WebSocket upgrade path by sending a crafted Sec-WebSocket-Key header. The HTTP/1 header parser copies the header into a fixed-size buffer using a bounded copy that does not guarantee NUL termination when the input length reaches the buffer size. During upgrade handling the buffer is copied to a local stack buffer and passed to strlen(); if no NUL exists in-bounds, strlen() reads beyond the stack buffer and subsequent concatenation with the WebSocket magic string can write out of bounds. This leads to out-of-bounds read and write on stack memory, resulting in crash (denial of service) and potentially code execution. The path is reachable when CONFIG_HTTP_SERVER_WEBSOCKET is enabled."}, {"lang": "es", "value": "Un atacante remoto no autenticado puede desencadenar corrupci\u00f3n de memoria en la ruta de actualizaci\u00f3n de WebSocket del servidor HTTP de Zephyr al enviar una cabecera Sec-WebSocket-Key manipulada. El analizador de cabeceras HTTP/1 copia la cabecera en un b\u00fafer de tama\u00f1o fijo utilizando una copia acotada que no garantiza la terminaci\u00f3n NUL cuando la longitud de entrada alcanza el tama\u00f1o del b\u00fafer. Durante el manejo de la actualizaci\u00f3n, el b\u00fafer se copia a un b\u00fafer de pila local y se pasa a strlen(); si no existe un NUL dentro de los l\u00edmites, strlen() lee m\u00e1s all\u00e1 del b\u00fafer de pila y la concatenaci\u00f3n subsiguiente con la cadena m\u00e1gica de WebSocket puede escribir fuera de los l\u00edmites. Esto conduce a lectura y escritura fuera de los l\u00edmites en la memoria de pila, lo que resulta en un fallo (denegaci\u00f3n de servicio) y potencialmente ejecuci\u00f3n de c\u00f3digo. La ruta es accesible cuando CONFIG_HTTP_SERVER_WEBSOCKET est\u00e1 habilitado."}], "id": "CVE-2026-5067", "lastModified": "2026-10-15T23:17:37.387", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "vulnerabilities@zephyrproject.org", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-5067", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-06-09T13:11:48.752906Z", "version": "2.0.3"}}]}, "published": "2026-06-09T06:16:53.920", "references": [{"source": "vulnerabilities@zephyrproject.org", "tags": ["Exploit", "Patch", "Vendor Advisory"], "url": "https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-wgr4-9pwq-94vj"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Patch", "Vendor Advisory"], "url": "https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-wgr4-9pwq-94vj"}], "sourceIdentifier": "vulnerabilities@zephyrproject.org", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-170"}, {"lang": "en", "value": "CWE-787"}], "source": "vulnerabilities@zephyrproject.org", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-787"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{}

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