CVE-2021-46792

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.

Category

5.9
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.12%
Vendor Advisory amd.com
Affected: AMD Ryzen™ 2000 series Desktop Processors “Raven Ridge” AM4
Affected: AMD Ryzen™ 5000 Series Desktop processor with Radeon™ Graphics “Cezanne” AM4
Affected: AMD Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics “Dali”/”Dali” ULP
Affected: AMD Ryzen™ 2000 Series Mobile Processors “Raven Ridge” FP5
Affected: AMD Ryzen™ 3000 Series Mobile processor, 2nd Gen AMD Ryzen™ Mobile Processors with Radeon™ Graphics “Picasso”
Affected: AMD Ryzen™ 3000 Series Mobile Processors with Radeon™ Graphics “Renoir”
Affected: AMD Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics “Lucienne”
Affected: AMD Ryzen™ 5000 Series Mobile processors with Radeon™ Graphics “Cezanne”
Published at:
Updated at:

References

Link Tags
https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4001 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-46792?
CVE-2021-46792 has been scored as a medium severity vulnerability.
How to fix CVE-2021-46792?
To fix CVE-2021-46792, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-46792 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-46792 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-46792?
CVE-2021-46792 affects AMD Ryzen™ 2000 series Desktop Processors “Raven Ridge” AM4, AMD Ryzen™ 5000 Series Desktop processor with Radeon™ Graphics “Cezanne” AM4, AMD Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics “Dali”/”Dali” ULP, AMD Ryzen™ 2000 Series Mobile Processors “Raven Ridge” FP5, AMD Ryzen™ 3000 Series Mobile processor, 2nd Gen AMD Ryzen™ Mobile Processors with Radeon™ Graphics “Picasso”, AMD Ryzen™ 3000 Series Mobile Processors with Radeon™ Graphics “Renoir” , AMD Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics “Lucienne”, AMD Ryzen™ 5000 Series Mobile processors with Radeon™ Graphics “Cezanne”.
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