This update for libvirt fixes the following issues: Security issues fixed: - CVE-2019-3840: Fixed a null pointer dereference vulnerability in virJSONValueObjectHasKey function which could have resulted in a remote denial of service via the guest agent . - CVE-2019-3886: Fixed an information leak which allowed to retrieve the guest hostname under readonly mode . Other issue addressed: - cpu: add Skylake-Server and Skylake-Server-IBRS CPU models - libxl: save current memory value after successful balloon . - libxl: support Xen"s max_grant_frames setting with maxGrantFrames attribute on the xenbus controller . - conf: add new "xenbus" controller type