Qubes OS 4.0-rc4 released, with Spectre/Meltdown safeguards

Qubes OS 4.0-rc4 has been released!
Jan 31, 2018 by Andrew David Wong in Releases
We’re pleased to announce the fourth release candidate for Qubes 4.0! This release contains important safeguards against the Spectre and Meltdown attacks, as well as bug fixes for many of the issues discovered in the previous release candidate.[…]

https://www.qubes-os.org/

https://www.qubes-os.org/news/2018/01/31/qubes-40-rc4/