VMware has just released a new hotfix for ESXi and vSAN (KB 2151081) urging customers with all-flash configuration with deduplication enabled to upgrade their environment as soon as possible. This patch resolves data corruption issue which might appear in rare circumstances.
The affected versions of vSAN include 6.5, 6.6, and 6.6.1.
06-10-2017 – Update 1: As listed in KB 2151042, similar issue has been fixed for ESXi 6.0.