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).
- CVE-2019-18423: A malicious guest administrator may cause a hypervisor crash,
resulting in a Denial of Service (DoS) (bsc#1154460 XSA-301).
- CVE-2019-18422: A malicious ARM guest might contrive to arrange for critical
Xen code to run with interrupts erroneously enabled. This could lead to data
corruption, denial of service, or possibly even privilege escalation. However
a precise attack technique has not been identified. (bsc#1154464 XSA-303)