Secure Encrypted Virtualization (SEV) on Advanced Micro Devices (AMD) Platform Security Processor (PSP; aka AMD Secure Processor or AMD-SP) 0.17 build 11 and earlier has an insecure cryptographic implementation.
https://www.amd.com/en/corporate/product-security
https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03943en_us
https://seclists.org/fulldisclosure/2019/Jun/46
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00032.html