CVE-2021-46755: High severity amd ryzen 5 5500 firmware vulnerability

Published May 9, 2023
·
Updated

Failure to unmap certain SysHub mappings in error paths of the ASP (AMD Secure Processor) bootloader may allow an attacker with a malicious bootloader to exhaust the SysHub resources resulting in a potential denial of service.

Affected Software

161 affected components
AMD Ryzen 5500 Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 5500
AMD Ryzen 5500 Firmware=comboam4v2_pi_1.2.0.6
AMD Ryzen 5600 Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 5600
AMD Ryzen 5600 Firmware=comboam4v2_pi_1.2.0.6
AMD Ryzen 5600g Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 5600g
AMD Ryzen 5600g Firmware=comboam4v2_pi_1.2.0.6
AMD Ryzen 5600x Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 5600x
AMD Ryzen 5600x Firmware=comboam4v2_pi_1.2.0.6
AMD Ryzen 5700g Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 5700g
AMD Ryzen 5700g Firmware=comboam4v2_pi_1.2.0.6
AMD Ryzen 5700x Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 5700x
AMD Ryzen 5700x Firmware=comboam4v2_pi_1.2.0.6
AMD Ryzen 5800x3d Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 5800x3d
AMD Ryzen 5800x3d Firmware=comboam4v2_pi_1.2.0.6
AMD Ryzen 5800x Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 5800x
AMD Ryzen 5800x Firmware=comboam4v2_pi_1.2.0.6
AMD Ryzen 5900x Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 5900x
AMD Ryzen 5900x Firmware=comboam4v2_pi_1.2.0.6
AMD Ryzen 5950x Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 5950x
AMD Ryzen 5950x Firmware=comboam4v2_pi_1.2.0.6
AMD Ryzen 3100 Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 3100
AMD Ryzen 3100 Firmware=comboam4pi_1.0.0.9
AMD Ryzen 3300x Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 3300x
AMD Ryzen 3300x Firmware=comboam4pi_1.0.0.9
AMD Ryzen 3500 Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 3500
AMD Ryzen 3500 Firmware=comboam4pi_1.0.0.9
AMD Ryzen 3500x Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 3500x
AMD Ryzen 3500x Firmware=comboam4pi_1.0.0.9
AMD Ryzen 3600 Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 3600
AMD Ryzen 3600 Firmware=comboam4pi_1.0.0.9
AMD Ryzen 3600x Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 3600x
AMD Ryzen 3600x Firmware=comboam4pi_1.0.0.9
AMD Ryzen 3600xt Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 3600xt
AMD Ryzen 3600xt Firmware=comboam4pi_1.0.0.9
AMD Ryzen 3800x Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 3800x
AMD Ryzen 3800x Firmware=comboam4pi_1.0.0.9
AMD Ryzen 3800xt Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 3800xt
AMD Ryzen 3800xt Firmware=comboam4pi_1.0.0.9
AMD Ryzen 3900 Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 3900
AMD Ryzen 3900 Firmware=comboam4pi_1.0.0.9
AMD Ryzen 3900x Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 3900x
AMD Ryzen 3900x Firmware=comboam4pi_1.0.0.9
AMD Ryzen 3900xt Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 3900xt
AMD Ryzen 3900xt Firmware=comboam4pi_1.0.0.9
AMD Ryzen 3950x Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 3950x
AMD Ryzen 3950x Firmware=comboam4pi_1.0.0.9
All of the following
AMD Ryzen 5500 Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 5500
All of the following
AMD Ryzen 5500 Firmware=comboam4v2_pi_1.2.0.6
AMD Ryzen 5500
All of the following
AMD Ryzen 5600 Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 5600
All of the following
AMD Ryzen 5600 Firmware=comboam4v2_pi_1.2.0.6
AMD Ryzen 5600
All of the following
AMD Ryzen 5600g Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 5600g
All of the following
AMD Ryzen 5600g Firmware=comboam4v2_pi_1.2.0.6
AMD Ryzen 5600g
All of the following
AMD Ryzen 5600x Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 5600x
All of the following
AMD Ryzen 5600x Firmware=comboam4v2_pi_1.2.0.6
AMD Ryzen 5600x
All of the following
AMD Ryzen 5700g Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 5700g
All of the following
AMD Ryzen 5700g Firmware=comboam4v2_pi_1.2.0.6
AMD Ryzen 5700g
All of the following
AMD Ryzen 5700x Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 5700x
All of the following
AMD Ryzen 5700x Firmware=comboam4v2_pi_1.2.0.6
AMD Ryzen 5700x
All of the following
AMD Ryzen 5800x3d Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 5800x3d
All of the following
AMD Ryzen 5800x3d Firmware=comboam4v2_pi_1.2.0.6
AMD Ryzen 5800x3d
All of the following
AMD Ryzen 5800x Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 5800x
All of the following
AMD Ryzen 5800x Firmware=comboam4v2_pi_1.2.0.6
AMD Ryzen 5800x
All of the following
AMD Ryzen 5900x Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 5900x
All of the following
AMD Ryzen 5900x Firmware=comboam4v2_pi_1.2.0.6
AMD Ryzen 5900x
All of the following
AMD Ryzen 5950x Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 5950x
All of the following
AMD Ryzen 5950x Firmware=comboam4v2_pi_1.2.0.6
AMD Ryzen 5950x
All of the following
AMD Ryzen 3100 Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 3100
All of the following
AMD Ryzen 3100 Firmware=comboam4pi_1.0.0.9
AMD Ryzen 3100
All of the following
AMD Ryzen 3300x Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 3300x
All of the following
AMD Ryzen 3300x Firmware=comboam4pi_1.0.0.9
AMD Ryzen 3300x
All of the following
AMD Ryzen 3500 Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 3500
All of the following
AMD Ryzen 3500 Firmware=comboam4pi_1.0.0.9
AMD Ryzen 3500
All of the following
AMD Ryzen 3500x Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 3500x
All of the following
AMD Ryzen 3500x Firmware=comboam4pi_1.0.0.9
AMD Ryzen 3500x
All of the following
AMD Ryzen 3600 Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 3600
All of the following
AMD Ryzen 3600 Firmware=comboam4pi_1.0.0.9
AMD Ryzen 3600
All of the following
AMD Ryzen 3600x Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 3600x
All of the following
AMD Ryzen 3600x Firmware=comboam4pi_1.0.0.9
AMD Ryzen 3600x
All of the following
AMD Ryzen 3600xt Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 3600xt
All of the following
AMD Ryzen 3600xt Firmware=comboam4pi_1.0.0.9
AMD Ryzen 3600xt
All of the following
AMD Ryzen 3800x Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 3800x
All of the following
AMD Ryzen 3800x Firmware=comboam4pi_1.0.0.9
AMD Ryzen 3800x
All of the following
AMD Ryzen 3800xt Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 3800xt
All of the following
AMD Ryzen 3800xt Firmware=comboam4pi_1.0.0.9
AMD Ryzen 3800xt
All of the following
AMD Ryzen 3900 Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 3900
All of the following
AMD Ryzen 3900 Firmware=comboam4pi_1.0.0.9
AMD Ryzen 3900
All of the following
AMD Ryzen 3900x Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 3900x
All of the following
AMD Ryzen 3900x Firmware=comboam4pi_1.0.0.9
AMD Ryzen 3900x
All of the following
AMD Ryzen 3900xt Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 3900xt
All of the following
AMD Ryzen 3900xt Firmware=comboam4pi_1.0.0.9
AMD Ryzen 3900xt
All of the following
AMD Ryzen 3950x Firmware=comboam4_v2_pi_1.2.0.8
AMD Ryzen 3950x
All of the following
AMD Ryzen 3950x Firmware=comboam4pi_1.0.0.9
AMD Ryzen 3950x

Event History

May 9, 2023
CVE Published
via MITRE·07:00 PM
Data Sourced
via MITRE·07:00 PM
Description
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Frequently Asked Questions

1

What is the severity of CVE-2021-46755?

CVE-2021-46755 is classified as a denial of service vulnerability due to the failure to unmap certain SysHub mappings.

2

How do I fix CVE-2021-46755?

To fix CVE-2021-46755, it is recommended to update the firmware to a version that addresses this issue.

3

What products are affected by CVE-2021-46755?

CVE-2021-46755 affects various AMD Ryzen firmware versions, including comboam4_v2_pi_1.2.0.8 and comboam4v2_pi_1.2.0.6.

4

What could an attacker do by exploiting CVE-2021-46755?

An attacker could exploit CVE-2021-46755 to exhaust SysHub resources, potentially leading to a denial of service.

5

Is CVE-2021-46755 specific to certain AMD processors?

Yes, CVE-2021-46755 impacts specific AMD processors including the Ryzen 5000 series and Ryzen 3000 series among others.

Company

Resources

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