CVE-2023-20578
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 0.1%
exploitation probability
0.1%top 98% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Affected products
AMD · AMD EPYC™ 7001 ProcessorsAMD · AMD EPYC™ 7002 ProcessorsAMD · AMD EPYC™ 7003 ProcessorsAMD · AMD EPYC™ 9004 ProcessorsAMD · AMD EPYC™ Embedded 3000AMD · AMD EPYC™ Embedded 7002AMD · AMD EPYC™ Embedded 7003AMD · AMD EPYC™ Embedded 9003AMD · AMD Ryzen™ 6000 Series Processors with Radeon™ GraphicsAMD · AMD Ryzen™ 7000 Series Desktop ProcessorsAMD · AMD Ryzen™ 7020 Series Processors with Radeon™ GraphicsAMD · AMD Ryzen™ 7035 Series Processors with Radeon™ GraphicsAMD · AMD Ryzen™ Embedded 7000AMD · AMD RyzenTM Embedded V3000AMD · AMD Ryzen™ Threadripper™ PRO 5000WX Processors