This update for xen fixes several issues. These security issues were fixed: - CVE-2018-8897: Prevent mishandling of debug exceptions on x86 - Handle HPET timers in IO-APIC mode correctly to prevent malicious or buggy HVM guests from causing a hypervisor crash or potentially privilege escalation/information leaks - Prevent unbounded loop, induced by qemu allowing an attacker to permanently keep a physical CPU core busy - CVE-2018-10472: x86 HVM guest OS users were able to read arbitrary dom0 files via QMP live insertion of a CDROM, in conjunction with specifying the target file as the backing file of a snapshot . - CVE-2018-10471: x86 PV guest OS users were able to cause a denial of service via unexpected INT 80 processing, because of an incorrect fix for CVE-2017-5754 . These non-security issues were fixed: - bsc#1086039: Ensure that Dom0 does represent DomU cpu flags correctly - bsc#1027519: Fixed shadow mode guests