CVE-2021-46792

moderate-risk
Published 2023-05-09

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.

Do I need to act?

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0.16% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.9/10 Medium
NETWORK / HIGH complexity

Affected Products (20)

Ryzen 5300G Firmware
Ryzen 5300Ge Firmware
Ryzen 5500 Firmware
Ryzen 5600 Firmware
Ryzen 5600G Firmware
Ryzen 5600Ge Firmware
Ryzen 5600X Firmware
Ryzen 5700G Firmware
Ryzen 5700Ge Firmware
Ryzen 5700X Firmware
Ryzen 5800 Firmware
Ryzen 5800X3D Firmware
Ryzen 5800X Firmware
Ryzen 5900 Firmware
Ryzen 5900X Firmware
Ryzen 5945Wx Firmware
Ryzen 5950X Firmware
Ryzen 5955Wx Firmware
Ryzen 5965Wx Firmware
Ryzen 5975Wx Firmware

Affected Vendors

Amd

References (2)

Vendor Advisory https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4001
Vendor Advisory https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4001
49
/ 100
moderate-risk
Severity 18/34 · Moderate
Exploitability 1/34 · Minimal
Exposure 30/34 · Critical