We are a week removed from the announcement from CTS Labs concerning the very serious vulnerabilities discovered in the Ryzen and EPYC chipsets from AMD. AMD has acknowledged these vulnerabilities and is working toward patches and mitigation methods. There are 13 vulnerabilities in total and several are software/firmware related, while at least one is hardware related and specific to support for the core processor.
I am including an article from ThreatPost as well as a link to the source material from CTS Labs. CTS Labs has been extremely thorough in their explanations of these vulnerabilities and related media coverage. Educate yourself and be prepared to patch and remediate your environment and those of your customers if these chips are present and in production.