Xen Security Advisory CVE-2017-10923
Description: Xen through 4.8.x does not validate a vCPU array index upon the sending of an SGI, which allows guest OS users to cause a denial of service (hypervisor crash), aka XSA-225.
Impact: A guest may cause a hypervisor crash, resulting in a Denial of Service (DoS).
Mitigation: Updates are available. Please check specific vendor advisory for more information.