Information
Using the VMware DirectPath I/O feature to pass through a PCI or PCIe device to a virtual machine can result in a potential security vulnerability.
Rationale:
The vulnerability can be triggered by buggy or malicious code running in privileged mode in the guest OS, such as a device driver.
Solution
Using the vSphere Web Client:
Select each VM
Click 'Configure' -> 'Settings' -> 'Virtual Hardware' ->
Remove the PCI/PCIe passthrough device.
Additionally, the following PowerCLI command can be used:
# Add the setting to all VMs
Get-VM | New-AdvancedSetting -Name 'pciPassthru*.present' -value ''