This week VMware released the Update b for VCSA 6.7.0.
With this update VMware fixes a security issue regarding the hypervisor-assisted guest mitigation of CVE-2018-3639 for guest operating systems
The full information about the vCenter updates can be found here:
VMware vCenter Server 6.7.0b Release Notes
Version: vCenter Server 6.7.0b (184.108.40.20600)
How to update the VCSA can be found here: