Be patient! KB4100375. Stay tuned!

If the memory leak is intensive, it can cause the program to crash or even make the whole computer freeze. The most common reason programs have memory leaks is due to a programming error where unused memory is not allocated back to the system.Memory leaks are a class of bugs where the application fails to release memory when no longer needed. A large leak might result in unacceptable response times due to excessive paging. The windows 10  security update (KB4100375) rescheduled because of above reasons.

For more details, please refer below url for reference.

Microsoft explains why Windows 10 Spring Creators Update delayed