This update for xen fixes the following issues:
Update to Xen 4.11.1 bug fix release (bsc#1027519)
CVE-2018-17963: Fixed an integer overflow issue in the QEMU emulator, which could occur when a packet with large packet size is processed. A user inside a guest could have used this flaw to crash the qemu process resulting in a Denial of Service (DoS). (bsc#1111014)
Other bugs fixed: