This update for xen fixes several issues. This feature was added: - Added support for qemu monitor command These security issues were fixed: - CVE-2018-3639: Prevent attackers with local user access from extracting information via a side-channel analysis, aka Speculative Store Bypass , Variant 4 . - CVE-2017-5753,CVE-2017-5715,CVE-2017-5754: Improved Spectre v2 mitigations . This non-security issue was fixed: - bsc#1086039 - Dom0 does not represent DomU cpu flags