5.9 Medium

CVE-2021-46792 Time-of-check Time-of-use (TOCTOU) in the BIOS2PSP command may allow an attacker with a malicious BIOS to create a…

Description

Time-of-check Time-of-use (TOCTOU) in the BIOS2PSP command may allow an attacker with a malicious BIOS to create a race condition causing the ASP bootloader to perform out-of-bounds SRAM reads upon an S3 resume event potentially leading to a denial of service.

Affected products and versions

Product	Affected versions	Fixed in
Ryzen™ 2000 series Desktop Processors “Raven Ridge” AM4	Versions not published
Ryzen™ 5000 Series Desktop processor with Radeon™ Graphics “Cezanne” AM4	Versions not published
Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics “Dali”/”Dali” ULP	Versions not published
Ryzen™ 2000 Series Mobile Processors “Raven Ridge” FP5	Versions not published
Ryzen™ 3000 Series Mobile processor, 2nd Gen AMD Ryzen™ Mobile Processors with Radeon™ Graphics “Picasso”	Versions not published
Ryzen™ 3000 Series Mobile Processors with Radeon™ Graphics “Renoir”	Versions not published
Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics “Lucienne”	Versions not published
Ryzen™ 5000 Series Mobile processors with Radeon™ Graphics “Cezanne”	Versions not published

References

www.amd.com www.amd.com

Timeline

Published May 9, 2023
Last modified January 28, 2025

The 11 CVEs of Ryzen™ 2000 series Desktop Processors “Raven Ridge” AM4 →

CVE-2021-46794 Insufficient bounds checking in ASP (AMD Secure Processor) may allow for an out of bounds read in SMI (System Management… 7.5 High CVE-2021-46773 Insufficient input validation in ABL may enable a privileged attacker to corrupt ASP memory, potentially resulting in… 8.8 High CVE-2021-46759 Improper syscall input validation in AMD TEE (Trusted Execution Environment) may allow an attacker with physical… 6.1 Medium CVE-2021-46756 Insufficient validation of inputs in SVC_MAP_USER_STACK in the ASP (AMD Secure Processor) bootloader may allow an… 9.1 Critical

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