CVE-2023-20578
No fix known EPSS <1%CVSS 7.5
A TOCTOU (Time-Of-Check-Time-Of-Use) in SMM may allow an attacker with ring0 privileges and access to the BIOS menu or UEFI shell to modify the communications buffer potentially resulting in arbitrary code execution.
Products: AMD EPYC™ 7001 Processors, AMD EPYC™ 7002 Processors, AMD EPYC™ 7003 Processors, AMD EPYC™ 9004 Processors, AMD Ryzen™ 7000 Series Desktop Processors, AMD Ryzen™ Threadripper™ PRO 5000WX Processors, AMD Ryzen™ 7020 Series Processors with Radeon™ Graphics, AMD Ryzen™ 6000 Series Processors with Radeon™ Graphics, AMD Ryzen™ 7035 Series Processors with Radeon™ Graphics, AMD EPYC™ Embedded 3000, AMD EPYC™ Embedded 7002, AMD EPYC™ Embedded 7003, AMD EPYC™ Embedded 9003, AMD Ryzen™ Embedded 7000, AMD RyzenTM Embedded V3000, amd epyc_7001, amd epyc_7002, amd epyc_9004, amd epyc_embedded_3000, amd epyc_embedded_7002, amd epyc_embedded_7003, amd epyc_embedded_9003, amd ryzen_embedded_7000, amd ryzen_embedded_v3000