This is a known hardware issue affecting supported versions of ESXi host with Intel Xeon Processor E5 v4, E7 v4, and D-1500 families. This is a not a VMware issue.
To resolve this issue, upgrade the system BIOS (firmware) to a version which provides the following microcode patch revision level for the associated Intel Xeon processors:
CPU Family
CPUID Model (Stepping)
Required Microcode Patch Revision
Supported ESXi Version
Intel Xeon E5-2600-v4 Intel Xeon E5-4600-v4
0x406F1 (B0 Stepping)
0x0b00001b or later
ESXi 5.5 U3b or later ESXi 6.0 U1b or later ESXi 6.5 GA or later
Intel Xeon E7-8800-v4 Intel Xeon E7-4800-v4
0x406F1 (B0 Stepping)
0x0b00001b or later
ESXi 6.0 U1b or later ESXi 6.5 GA or later
Intel Xeon D-1500
0x50663 (V2 Stepping)
0x0700000c or later
ESXi 6.0 U1b or later ESXi 6.5 GA or later
Intel Xeon D-1500
0x50664 (Y0 Stepping)
0x0f00000a or later
ESXi 6.0 U1b or later ESXi 6.5 GA or later
For more information, contact your hardware vendor.
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Backtrace
The backtrace can also contain entries after Code start: line similar to: