CVE-2026-49430

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"75973F7C-645A-438C-A03B-C77AAAD20C15", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The ZFS_IOC_RECV_NEW ioctl, in the heal receive path, similarly truncated a 64-bit payload size to a 32-bit integer for allocation, then used the original 64-bit size as the length for a byteswap operation.\n\nA local user with the \"receive\" delegated ZFS permission can trigger kernel memory corruption via ZFS_IOC_RECV_NEW by sending a crafted receive stream in heal mode."}, {"lang": "es", "value": "El ioctl ZFS_IOC_RECV_NEW, en la ruta de recepci\u00f3n de recuperaci\u00f3n, trunc\u00f3 de manera similar un tama\u00f1o de carga \u00fatil de 64 bits a un entero de 32 bits para la asignaci\u00f3n, y luego us\u00f3 el tama\u00f1o original de 64 bits como la longitud para una operaci\u00f3n de intercambio de bytes.\n\nUn usuario local con el permiso ZFS delegado \u2019receive\u2019 puede desencadenar corrupci\u00f3n de memoria del kernel a trav\u00e9s de ZFS_IOC_RECV_NEW enviando un flujo de recepci\u00f3n manipulado en modo de recuperaci\u00f3n."}], "id": "CVE-2026-49430", "lastModified": "2026-11-09T20:10:00.200", "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-2026-49430", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-08-26T17:41:34.004036Z", "version": "2.0.3"}}]}, "published": "2026-08-19T06:17:42.767", "references": [{"source": "secteam@freebsd.org", "tags": ["Vendor Advisory"], "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:40.zfs.asc"}], "sourceIdentifier": "secteam@freebsd.org", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-122"}], "source": "secteam@freebsd.org", "type": "Secondary"}]}

{}

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