Intel processors (x86-64) have a severe hardware-level issue that could allow attackers to access protected kernel memory. AMD processors are not affected by the vulnerability due to security protections that the company has in place, said Tom Lendacky, a member of the Linux OS group at AMD. Microsoft is likely to fix the issue for its Windows operating system in an upcoming Patch Tuesday, and Apple is also likely working on a patch to address the vulnerability. It is noteworthy that installing the update will hit your system speed negatively and could bring down CPU performance by 5 percent to 30 percent.
Source: https://thehackernews.com/2018/01/intel-kernel-vulnerability.html