{"id":"UBUNTU-CVE-2016-9382","details":"Xen 4.0.x through 4.7.x mishandle x86 task switches to VM86 mode, which allows local 32-bit x86 HVM guest OS users to gain privileges or cause a denial of service (guest OS crash) by leveraging a guest operating system that uses hardware task switching and allows a new task to start in VM86 mode.","modified":"2026-04-22T11:45:46.888621Z","published":"2017-01-23T21:59:00Z","upstream":["CVE-2016-9382"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2016-9382"},{"type":"REPORT","url":"https://xenbits.xen.org/xsa/advisory-192.html"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2016-9382"}],"affected":[{"package":{"name":"xen","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/xen@4.4.2-0ubuntu0.14.04.9?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4.2-0ubuntu0.14.04.9"}]}],"versions":["4.3.0-1ubuntu1","4.3.0-1ubuntu2","4.3.0-1ubuntu3","4.3.0-1ubuntu4","4.3.0-1ubuntu5","4.4.0-0ubuntu3","4.4.0-0ubuntu4","4.4.0-0ubuntu5","4.4.0-0ubuntu5.1","4.4.0-0ubuntu5.2","4.4.1-0ubuntu0.14.04.1","4.4.1-0ubuntu0.14.04.2","4.4.1-0ubuntu0.14.04.3","4.4.1-0ubuntu0.14.04.4","4.4.1-0ubuntu0.14.04.5","4.4.1-0ubuntu0.14.04.6","4.4.2-0ubuntu0.14.04.1","4.4.2-0ubuntu0.14.04.2","4.4.2-0ubuntu0.14.04.3","4.4.2-0ubuntu0.14.04.4","4.4.2-0ubuntu0.14.04.5","4.4.2-0ubuntu0.14.04.6","4.4.2-0ubuntu0.14.04.7"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libxen-4.4","binary_version":"4.4.2-0ubuntu0.14.04.9"},{"binary_name":"libxen-ocaml","binary_version":"4.4.2-0ubuntu0.14.04.9"},{"binary_name":"libxenstore3.0","binary_version":"4.4.2-0ubuntu0.14.04.9"},{"binary_name":"xen-hypervisor-4.1-amd64","binary_version":"4.4.2-0ubuntu0.14.04.9"},{"binary_name":"xen-hypervisor-4.3-amd64","binary_version":"4.4.2-0ubuntu0.14.04.9"},{"binary_name":"xen-hypervisor-4.3-armhf","binary_version":"4.4.2-0ubuntu0.14.04.9"},{"binary_name":"xen-hypervisor-4.4-amd64","binary_version":"4.4.2-0ubuntu0.14.04.9"},{"binary_name":"xen-hypervisor-4.4-arm64","binary_version":"4.4.2-0ubuntu0.14.04.9"},{"binary_name":"xen-hypervisor-4.4-armhf","binary_version":"4.4.2-0ubuntu0.14.04.9"},{"binary_name":"xen-system-amd64","binary_version":"4.4.2-0ubuntu0.14.04.9"},{"binary_name":"xen-system-arm64","binary_version":"4.4.2-0ubuntu0.14.04.9"},{"binary_name":"xen-system-armhf","binary_version":"4.4.2-0ubuntu0.14.04.9"},{"binary_name":"xen-utils-4.4","binary_version":"4.4.2-0ubuntu0.14.04.9"},{"binary_name":"xen-utils-common","binary_version":"4.4.2-0ubuntu0.14.04.9"},{"binary_name":"xenstore-utils","binary_version":"4.4.2-0ubuntu0.14.04.9"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-9382.json"}},{"package":{"name":"xen","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/xen@4.6.0-1ubuntu4.3?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.6.0-1ubuntu4.3"}]}],"versions":["4.5.1-0ubuntu1","4.5.1-0ubuntu2","4.6.0-1ubuntu1","4.6.0-1ubuntu2","4.6.0-1ubuntu4","4.6.0-1ubuntu4.1","4.6.0-1ubuntu4.2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libxen-4.6","binary_version":"4.6.0-1ubuntu4.3"},{"binary_name":"libxenstore3.0","binary_version":"4.6.0-1ubuntu4.3"},{"binary_name":"xen-hypervisor-4.4-amd64","binary_version":"4.6.0-1ubuntu4.3"},{"binary_name":"xen-hypervisor-4.4-arm64","binary_version":"4.6.0-1ubuntu4.3"},{"binary_name":"xen-hypervisor-4.4-armhf","binary_version":"4.6.0-1ubuntu4.3"},{"binary_name":"xen-hypervisor-4.5-amd64","binary_version":"4.6.0-1ubuntu4.3"},{"binary_name":"xen-hypervisor-4.5-arm64","binary_version":"4.6.0-1ubuntu4.3"},{"binary_name":"xen-hypervisor-4.5-armhf","binary_version":"4.6.0-1ubuntu4.3"},{"binary_name":"xen-hypervisor-4.6-amd64","binary_version":"4.6.0-1ubuntu4.3"},{"binary_name":"xen-hypervisor-4.6-arm64","binary_version":"4.6.0-1ubuntu4.3"},{"binary_name":"xen-hypervisor-4.6-armhf","binary_version":"4.6.0-1ubuntu4.3"},{"binary_name":"xen-system-amd64","binary_version":"4.6.0-1ubuntu4.3"},{"binary_name":"xen-system-arm64","binary_version":"4.6.0-1ubuntu4.3"},{"binary_name":"xen-system-armhf","binary_version":"4.6.0-1ubuntu4.3"},{"binary_name":"xen-utils-4.6","binary_version":"4.6.0-1ubuntu4.3"},{"binary_name":"xen-utils-common","binary_version":"4.6.0-1ubuntu4.3"},{"binary_name":"xenstore-utils","binary_version":"4.6.0-1ubuntu4.3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-9382.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}