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MEDIUM · 5.9

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 race condition causing the ASP bootloader to perform out-of-bounds SRAM reads upon an...

Vulnerability 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.

CVSS Score

5.9

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH

Affected Products

VendorProductVersions
AmdRyzen 5300G Firmwarecezannepi-fp6_1.0.0.6
AmdRyzen 5300G-
AmdRyzen 5300Ge Firmwarecezannepi-fp6_1.0.0.6
AmdRyzen 5300Ge-
AmdRyzen 5500 Firmwarecezannepi-fp6_1.0.0.6
AmdRyzen 5500-
AmdRyzen 5600 Firmwarecezannepi-fp6_1.0.0.6
AmdRyzen 5600-
AmdRyzen 5600G Firmwarecezannepi-fp6_1.0.0.6
AmdRyzen 5600G-
AmdRyzen 5600Ge Firmwarecezannepi-fp6_1.0.0.6
AmdRyzen 5600Ge-
AmdRyzen 5600X Firmwarecezannepi-fp6_1.0.0.6
AmdRyzen 5600X-
AmdRyzen 5700G Firmwarecezannepi-fp6_1.0.0.6
AmdRyzen 5700G-
AmdRyzen 5700Ge Firmwarecezannepi-fp6_1.0.0.6
AmdRyzen 5700Ge-
AmdRyzen 5700X Firmwarecezannepi-fp6_1.0.0.6
AmdRyzen 5700X-

Related Weaknesses (CWE)

CWE-367

References

FAQ

What is CVE-2021-46792?

CVE-2021-46792 is a vulnerability with a CVSS score of 5.9 (MEDIUM). 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...

How severe is CVE-2021-46792?

CVE-2021-46792 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-46792?

Check the references section above for vendor advisories and patch information. Affected products include: Amd Ryzen 5300G Firmware, Amd Ryzen 5300G, Amd Ryzen 5300Ge Firmware, Amd Ryzen 5300Ge, Amd Ryzen 5500 Firmware.