This update for libvirt fixes the following issues: Four new speculative execution information leak issues have been identified in Intel CPUs. - CVE-2018-12126: Microarchitectural Store Buffer Data Sampling - CVE-2018-12127: Microarchitectural Fill Buffer Data Sampling - CVE-2018-12130: Microarchitectural Load Port Data Sampling - CVE-2019-11091: Microarchitectural Data Sampling Uncacheable Memory These updates contain the libvirt adjustments, that pass through the new "md-clear" CPU flag . For more information on this set of vulnerabilities, check out https://www.suse.com/support/kb/doc/?id=7023736 Other security issues fixed: - CVE-2019-3886: Fixed an information leak which allowed to retrieve the guest hostname under readonly mode . - qemu: Add support for using AES secret for SCSI hotplug