CVE-2026-42512

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"value": "As dhclient is building an environment to pass to dhclient-script, it may need to resize the array of string pointers. The code which expands the array incorrectly calculates its new size when requesting memory, resulting in a heap buffer overrun.\n\nA specially crafted packet can cause dhclient to overrun its buffer of environment entries. This can result in a crash, but it may be possible to leverage this bug to achieve remote code execution."}, {"lang": "es", "value": "Mientras dhclient est\u00e1 construyendo un entorno para pasar a dhclient-script, puede necesitar redimensionar el array de punteros de cadena. El c\u00f3digo que expande el array calcula incorrectamente su nuevo tama\u00f1o al solicitar memoria, lo que resulta en un desbordamiento de b\u00fafer de pila.\n\nUn paquete especialmente dise\u00f1ado puede causar que dhclient desborde su b\u00fafer de entradas de entorno. Esto puede resultar en un fallo, pero puede ser posible aprovechar este error para lograr ejecuci\u00f3n remota de c\u00f3digo."}], "id": "CVE-2026-42512", "lastModified": "2026-11-11T21:10:00.200", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 5.9, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-42512", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-05-01T03:55:53.107126Z", "version": "2.0.3"}}]}, "published": "2026-04-30T09:16:03.373", "references": [{"source": "secteam@freebsd.org", "tags": ["Vendor Advisory"], "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:15.dhclient.asc"}], "sourceIdentifier": "secteam@freebsd.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-122"}], "source": "secteam@freebsd.org", "type": "Secondary"}]}

{}

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