While Doing the Update of vCenter, you might get into an issue as mentioned in the screenshot below: "Insufficient space on the source export partition '/' to accommodate all the data for upgrade data option 'core'. Required: 5.93 GB, current: 4.8 GB Resolution"
A small Blog which can help you to understand the Basic differences between the User and the Kernel Mode Processes.
(CVE) has released CVE-2018-12207 which raised a serious concern with the Intel processors where Intel processors can crash if a guest kernel alters the page size of an instruction fetch without first flushing the TLB. This vulnerability will result in a crash at the hypervisor.