https://www.techradar.com/news/amd-investigating-critical-vulnerabilities-in-its-latest-ryzen-and-epyc-cpus

Israeli security firm CTS Labs has released a white paper to the press which detail a number of vulnerabilities affecting current AMD CPUs.

The 13 vulnerabilities listed in the white paper allegedly affect all Ryzen and Ryzen Pro products currently on the market, as well as EPYC server CPUs made by AMD, although root-level (administrator) operating system access is required in order to exploit them.