US-CERT is aware of a set of security vulnerabilities—known as Meltdown and Spectre—that affect modern computer processors. Exploitation of these vulnerabilities could allow an attacker to obtain access to sensitive information.
Users and administrators are encouraged to review Vulnerability Note VU#584653, Microsoft's Advisory, and Mozilla's blog post for additional information and refer to their OS vendor for appropriate patches.
US-CERT is not aware of any active exploitation at this time. Additional information as it becomes available will be available on the following webpage: https://www.us-cert.gov/Meltdown-Spectre-Guidance