Intel Kabylake and Skylake CPUs have microcode bug - disable hyperthreading now!

[Cromulent]

So it appears that Intel Skylake and Kabylake CPUs have a microcode bug that can cause data corruption and data loss when hyperthreading is enabled. Users are advised to disable hyperthreading immediately until a BIOS / UEFI fix has been released. This effects all operating systems that use these CPUs including Windows, Linux and I assume Mac OS X.

https://www.theregister.co.uk/2017/06/25/intel_skylake_kaby_lake_microcode_bug/

 

[Cromulent]

Given how long Skylake has been out and the complete lack of user issues I think we are safe. The article made me feel like I was reading the Daily Mail.

This is the post on the Debian mailing list and is much more useful as it gets into the technical aspects of the bug. It is also much more trustworthy.

https://lists.debian.org/debian-devel/2017/06/msg00308.html