https://www.bleepingcomputer.com/news/security/new-lazy-fp-state-restore-vulnerability-affects-all-intel-core-cpus/

What a horrible year in security for Intel. First we had the Meltdown and Spectre vulnerabilities that never seem to go away. Now Intel has announced a new speculative execution side channel vulnerability involving "Lazy FP state restore" that could allow a malicious program to read data being used by other processes.

According to Intel this new vulnerability affects all Intel Intel Core-based microprocessors and is a bug in the actual CPU, so it does not matter what operating system the user is running. It could be Windows, Linux, BSD, or any other operating running an an Intel Core-based CPU and using "Lazy FPU context switching".