This update for xen fixes the following issues:
- A Mishandling of SYSCALL singlestep during emulation which could have
lead to privilege escalation. (XSA-204, bsc#1016340, CVE-2016-10013)
- CMPXCHG8B emulation failed to ignore operand size override which could
have lead to information disclosure. (XSA-200, bsc#1012651,
CVE-2016-9932)
- PV guests may have been able to mask interrupts causing a Denial of
Service. (XSA-202, bsc#1014298, CVE-2016-10024)