CVE-2021-46795

Published: Jan 11, 2023Modified: Jun 17, 2026

4.7

Vector

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

Exploitability: 1.0 / Impact: 3.6

Source: NVD

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.

Affected (3)

Products: Amd: Comboam4v2 Pi Firmware, Renoirpi Fp6 Firmware, Cezannepi Fp6 Firmware

Amd

3 products

Comboam4v2 Pi Firmware

Renoirpi Fp6 Firmware

Cezannepi Fp6 Firmware

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Amd Comboam4v2 Pi Firmware	Before 1.2.0.5

Configuration B

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Renoirpi Fp6 Firmware	Before 1.0.0.7

Running on/with	Platform Versions
Amd Comboam4v2 Pi	All versions

Configuration C

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Cezannepi Fp6 Firmware	Before 1.0.0.6

Running on/with	Platform Versions
Amd Cezannepi Fp6	All versions

Related CWEs

CWE-367

Time-of-check Time-of-use (TOCTOU) Race Condition

The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. This can cause the product to perform invalid actions when the resource is in an unexpected state.

References (2)

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

Source: psirt@amd.com

Vendor Advisory

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

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

Timeline

No history available yet.