CVE-2026-49418

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"75973F7C-645A-438C-A03B-C77AAAD20C15", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "When msync(MS_INVALIDATE) is called on a mapping of an unmanaged device object, the physical pages in the mapping range are marked invalid but remain in the pager's page list. A subsequent page fault will cause the fault handler to re-insert the page into the object's list. This corrupts the list, and on object destruction the page is freed twice.\n\nAn unprivileged local user with access to a device that provides memory-mapped I/O can trigger a use-after-free in the kernel, though this is limited to a pool of objects (\"fictitious pages\") that are never recycled for a different purpose. It may be possible to exploit this to escalate privileges."}, {"lang": "es", "value": "Cuando se llama a msync(MS_INVALIDATE) en una asignaci\u00f3n de un objeto de dispositivo no gestionado, las p\u00e1ginas f\u00edsicas en el rango de asignaci\u00f3n se marcan como inv\u00e1lidas pero permanecen en la lista de p\u00e1ginas del paginador. Una posterior falla de p\u00e1gina har\u00e1 que el gestor de fallas reinserte la p\u00e1gina en la lista del objeto. Esto corrompe la lista, y en la destrucci\u00f3n del objeto la p\u00e1gina se libera dos veces.\n\nUn usuario local sin privilegios con acceso a un dispositivo que proporciona E/S mapeada en memoria puede desencadenar un uso despu\u00e9s de liberaci\u00f3n en el kernel, aunque esto se limita a un grupo de objetos (p\u00e1ginas ficticias) que nunca se reciclan para un prop\u00f3sito diferente. Puede ser posible explotar esto para escalar privilegios."}], "id": "CVE-2026-49418", "lastModified": "2026-11-05T21:10:00.183", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-49418", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-08-20T03:56:05.175712Z", "version": "2.0.3"}}]}, "published": "2026-08-19T05:17:03.943", "references": [{"source": "secteam@freebsd.org", "tags": ["Vendor Advisory"], "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:37.vm.asc"}], "sourceIdentifier": "secteam@freebsd.org", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "secteam@freebsd.org", "type": "Secondary"}]}

{}

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