CVE-2026-49428

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These operations are not permitted on largepage objects, but the implementation did not verify this.\n\nAn unprivileged local user can abuse the bug to access freed kernel memory. This can be exploited to escalate privileges."}, {"lang": "es", "value": "Ciertas llamadas al sistema, como open(2) con el indicador O_TRUNC establecido, y fspacectl(2), podr\u00edan liberar memoria incorrectamente en objetos de p\u00e1gina grande. Estas operaciones no est\u00e1n permitidas en objetos de p\u00e1gina grande, pero la implementaci\u00f3n no verific\u00f3 esto.\n\nUn usuario local sin privilegios puede abusar del error para acceder a memoria del kernel liberada. Esto puede ser explotado para escalar privilegios."}], "id": "CVE-2026-49428", "lastModified": "2026-11-09T20:10:00.200", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 8.4, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.5, "impactScore": 5.9, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-49428", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-08-19T00:00:00+00:00", "version": "2.0.3"}}]}, "published": "2026-08-19T06:17:42.263", "references": [{"source": "secteam@freebsd.org", "tags": ["Vendor Advisory"], "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:44.posixshm.asc"}], "sourceIdentifier": "secteam@freebsd.org", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-915"}], "source": "secteam@freebsd.org", "type": "Secondary"}]}

{}

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