This update for xen fixes the following issues:

- CVE-2019-19581: Fixed a potential out of bounds on 32-bit Arm (bsc#1158003 XSA-307).
- CVE-2019-19582: Fixed a potential infinite loop when x86 accesses to bitmaps with
a compile time known size of 64 (bsc#1158003 XSA-307).
- CVE-2019-19583: Fixed improper checks which could have allowed HVM/PVH guest userspace
code to crash the guest,leading to a guest denial of service (bsc#1158004 XSA-308).
- CVE-2019-19578: Fixed an issue where a malicious or buggy PV guest could have caused
hypervisor crash resulting in denial of service affecting the entire host (bsc#1158005 XSA-309).
- CVE-2019-19580: Fixed a privilege escalation where a malicious PV guest administrator
could have been able to escalate their privilege to that of the host (bsc#1158006 XSA-310).
- CVE-2019-19577: Fixed an issue where a malicious guest administrator could have caused Xen
to access data structures while they are being modified leading to a crash (bsc#1158007 XSA-311).
- CVE-2019-19579: Fixed a privilege escaltion where an untrusted domain with access
to a physical device can DMA into host memory (bsc#1157888 XSA-306).
- Fixed an issue where PCI passthrough failed on AMD machine xen host (bsc#1157047).

This update was imported from the SUSE:SLE-15-SP1:Update update project.