CVE-2026-39457

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"value": "When exchanging data over a socket, libnv uses select(2) to wait for data to arrive. However, it does not verify whether the provided socket descriptor fits in select(2)'s file descriptor set size limit of FD_SETSIZE (1024).\n\nAn attacker who is able to force a libnv application to allocate large file descriptors, e.g., by opening many descriptors and executing a program which is not careful to close them upon startup, can trigger stack corruption. If the target application is setuid-root, then this could be used to elevate local privileges."}, {"lang": "es", "value": "Al intercambiar datos a trav\u00e9s de un socket, libnv utiliza select(2) para esperar la llegada de datos. Sin embargo, no verifica si el descriptor de socket proporcionado cabe en el l\u00edmite de tama\u00f1o del conjunto de descriptores de archivo de select(2) de FD_SETSIZE (1024).\n\nUn atacante que es capaz de forzar a una aplicaci\u00f3n libnv a asignar descriptores de archivo grandes, por ejemplo, abriendo muchos descriptores y ejecutando un programa que no tiene cuidado de cerrarlos al inicio, puede desencadenar corrupci\u00f3n de pila. Si la aplicaci\u00f3n objetivo es setuid-root, entonces esto podr\u00eda usarse para elevar privilegios locales."}], "id": "CVE-2026-39457", "lastModified": "2026-11-11T21:10:00.200", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-39457", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-04-30T00:00:00+00:00", "version": "2.0.3"}}]}, "published": "2026-04-30T09:16:03.270", "references": [{"source": "secteam@freebsd.org", "tags": ["Vendor Advisory"], "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:16.libnv.asc"}], "sourceIdentifier": "secteam@freebsd.org", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-121"}], "source": "secteam@freebsd.org", "type": "Secondary"}]}

{}

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