Kernel 4.13.6 has only been out for two days, but there has just been another update – 4.13.7 – with the following changes:  https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.7

If you are running 4.13.6, then update is – presumably – recommended ASAP!

Robert Gadsdon.   October 14, 2017.