{"id":"CVE-2018-18883","details":"An issue was discovered in Xen 4.9.x through 4.11.x, on Intel x86 platforms, allowing x86 HVM and PVH guests to cause a host OS denial of service (NULL pointer dereference) or possibly have unspecified other impact because nested VT-x is not properly restricted.","modified":"2026-03-12T22:48:24.964450Z","published":"2018-11-01T00:29:00.190Z","related":["SUSE-SU-2018:4070-1","SUSE-SU-2018:4300-1","SUSE-SU-2019:0003-1","openSUSE-SU-2024:11520-1"],"references":[{"type":"ADVISORY","url":"http://www.securityfocus.com/bid/105817"},{"type":"ADVISORY","url":"http://www.securitytracker.com/id/1042021"},{"type":"FIX","url":"https://xenbits.xen.org/xsa/advisory-278.html"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2018-18883.json","unresolved_ranges":[{"events":[{"introduced":"4.9.0"},{"last_affected":"4.11.0"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"}]}