CVE-2026-5072

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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": "A bitwise shift vulnerability in Zephyr's PTP subsystem allows a remote attacker to cause undefined behavior and potential system crashes. An attacker sends a crafted PTP_MSG_MANAGEMENT message to set an unvalidated negative log_announce_interval value in the port's data set. When a subsequent PTP_MSG_ANNOUNCE message is processed, port_timer_set_timeout_random computes a timeout as NSEC_PER_SEC >> -log_seconds; if the attacker-supplied value is sufficiently negative (e.g., -127), the shift amount exceeds the 64-bit integer width, triggering undefined behavior in C. This can cause a system crash via a compiler-generated illegal instruction trap on some architectures, or produce an erroneous zero timeout leading to resource starvation loops or other logical errors."}, {"lang": "es", "value": "Una vulnerabilidad de desplazamiento de bits en el subsistema PTP de Zephyr permite a un atacante remoto causar comportamiento indefinido y posibles fallos del sistema. Un atacante env\u00eda un mensaje PTP_MSG_MANAGEMENT manipulado para establecer un valor negativo no validado de log_announce_interval en el conjunto de datos del puerto. Cuando se procesa un mensaje PTP_MSG_ANNOUNCE subsiguiente, port_timer_set_timeout_random calcula un tiempo de espera como NSEC_PER_SEC >> -log_seconds; si el valor proporcionado por el atacante es suficientemente negativo (p. ej., -127), la cantidad de desplazamiento excede el ancho de entero de 64 bits, lo que desencadena un comportamiento indefinido en C. Esto puede causar un fallo del sistema a trav\u00e9s de una trampa de instrucci\u00f3n ilegal generada por el compilador en algunas arquitecturas, o producir un tiempo de espera cero err\u00f3neo lo que lleva a bucles de inanici\u00f3n de recursos u otros errores l\u00f3gicos."}], "id": "CVE-2026-5072", "lastModified": "2026-10-15T23:17:37.767", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-5072", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-05-22T16:27:18.853870Z", "version": "2.0.3"}}]}, "published": "2026-05-22T08:16:15.027", "references": [{"source": "vulnerabilities@zephyrproject.org", "tags": ["Exploit", "Patch", "Vendor Advisory"], "url": "https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-3v98-458v-388r"}], "sourceIdentifier": "vulnerabilities@zephyrproject.org", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-1335"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

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