CVE-2021-46795

MEDIUM

AMD comboam4v2_pi_firmware < 1.2.0.5 - Denial of Service via TOCTOU Race Condition

Title source: llm

Description

A TOCTOU (time-of-check to time-of-use) vulnerability exists where an attacker may use a compromised BIOS to cause the TEE OS to read memory out of bounds that could potentially result in a denial of service.

References (1)

Core 1

Core References

Vendor Advisory

https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1031

Scores

CVSS v3 4.7

EPSS 0.0004

EPSS Percentile 12.7%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-367

Status published

Products (3)

amd/cezannepi-fp6_firmware < 1.0.0.6

amd/comboam4v2_pi_firmware < 1.2.0.5

amd/renoirpi-fp6_firmware < 1.0.0.7

Published Jan 11, 2023

Tracked Since Feb 18, 2026