Seems the new year bring us some bad surprises in terms of security. There has been some rumors and now turned out to be truth that certain processors are vulnerable to certain attacks. Yes processors. That means that affects a wide variety of Operating Systems. As Microsoft puts it:
Microsoft is aware of a new publicly disclosed class of vulnerabilities referred to as “speculative execution side-channel attacks” that affect many modern processors and operating systems including Intel, AMD, and ARM. Note: this issue will affect other systems such as Android, Chrome, iOS, MacOS, so we advise customers to seek out guidance from those vendors.