CVE-2021-46755

Published: May 9, 2023Modified: Jun 17, 2026

7.5

Vector

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

Exploitability: 3.9 / Impact: 3.6

Source: NVD

Description

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 (46)

23 products

Ryzen 5800x3d Firmware

Ryzen 3600xt Firmware

Ryzen 3800x Firmware

Ryzen 3800xt Firmware

Ryzen 3900 Firmware

Ryzen 3900x Firmware

Ryzen 3900xt Firmware

Ryzen 3950x Firmware

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Amd Ryzen 5500 Firmware	Version comboam4_v2_pi_1.2.0.8

Configuration B

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Ryzen 5500 Firmware	Version comboam4v2_pi_1.2.0.6

Running on/with	Platform Versions
Amd Ryzen 5500	All versions

Configuration C

1 vulnerable

Vulnerable Software	Affected Versions
Amd Ryzen 5600 Firmware	Version comboam4_v2_pi_1.2.0.8

Configuration D

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Ryzen 5600 Firmware	Version comboam4v2_pi_1.2.0.6

Running on/with	Platform Versions
Amd Ryzen 5600	All versions

Configuration E

1 vulnerable

Vulnerable Software	Affected Versions
Amd Ryzen 5600g Firmware	Version comboam4_v2_pi_1.2.0.8

Configuration F

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Ryzen 5600g Firmware	Version comboam4v2_pi_1.2.0.6

Running on/with	Platform Versions
Amd Ryzen 5600g	All versions

Configuration G

1 vulnerable

Vulnerable Software	Affected Versions
Amd Ryzen 5600x Firmware	Version comboam4_v2_pi_1.2.0.8

Configuration H

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Ryzen 5600x Firmware	Version comboam4v2_pi_1.2.0.6

Running on/with	Platform Versions
Amd Ryzen 5600x	All versions

Configuration I

1 vulnerable

Vulnerable Software	Affected Versions
Amd Ryzen 5700g Firmware	Version comboam4_v2_pi_1.2.0.8

Configuration J

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Ryzen 5700g Firmware	Version comboam4v2_pi_1.2.0.6

Running on/with	Platform Versions
Amd Ryzen 5700g	All versions

Configuration K

1 vulnerable

Vulnerable Software	Affected Versions
Amd Ryzen 5700x Firmware	Version comboam4_v2_pi_1.2.0.8

Configuration L

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Ryzen 5700x Firmware	Version comboam4v2_pi_1.2.0.6

Running on/with	Platform Versions
Amd Ryzen 5700x	All versions

Configuration M

1 vulnerable

Vulnerable Software	Affected Versions
Amd Ryzen 5800x3d Firmware	Version comboam4_v2_pi_1.2.0.8

Configuration N

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Ryzen 5800x3d Firmware	Version comboam4v2_pi_1.2.0.6

Running on/with	Platform Versions
Amd Ryzen 5800x3d	All versions

Configuration O

1 vulnerable

Vulnerable Software	Affected Versions
Amd Ryzen 5800x Firmware	Version comboam4_v2_pi_1.2.0.8

Configuration P

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Ryzen 5800x Firmware	Version comboam4v2_pi_1.2.0.6

Running on/with	Platform Versions
Amd Ryzen 5800x	All versions

Configuration Q

1 vulnerable

Vulnerable Software	Affected Versions
Amd Ryzen 5900x Firmware	Version comboam4_v2_pi_1.2.0.8

Configuration R

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Ryzen 5900x Firmware	Version comboam4v2_pi_1.2.0.6

Running on/with	Platform Versions
Amd Ryzen 5900x	All versions

Configuration S

1 vulnerable

Vulnerable Software	Affected Versions
Amd Ryzen 5950x Firmware	Version comboam4_v2_pi_1.2.0.8

Configuration T

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Ryzen 5950x Firmware	Version comboam4v2_pi_1.2.0.6

Running on/with	Platform Versions
Amd Ryzen 5950x	All versions

Configuration U

1 vulnerable

Vulnerable Software	Affected Versions
Amd Ryzen 3100 Firmware	Version comboam4_v2_pi_1.2.0.8

Configuration V

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Ryzen 3100 Firmware	Version comboam4pi_1.0.0.9

Running on/with	Platform Versions
Amd Ryzen 3100	All versions

Configuration W

1 vulnerable

Vulnerable Software	Affected Versions
Amd Ryzen 3300x Firmware	Version comboam4_v2_pi_1.2.0.8

Configuration X

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Ryzen 3300x Firmware	Version comboam4pi_1.0.0.9

Running on/with	Platform Versions
Amd Ryzen 3300x	All versions

Configuration Y

1 vulnerable

Vulnerable Software	Affected Versions
Amd Ryzen 3500 Firmware	Version comboam4_v2_pi_1.2.0.8

Configuration Z

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Ryzen 3500 Firmware	Version comboam4pi_1.0.0.9

Running on/with	Platform Versions
Amd Ryzen 3500	All versions

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Amd Ryzen 3500x Firmware	Version comboam4_v2_pi_1.2.0.8

Configuration B

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Ryzen 3500x Firmware	Version comboam4pi_1.0.0.9

Running on/with	Platform Versions
Amd Ryzen 3500x	All versions

Configuration C

1 vulnerable

Vulnerable Software	Affected Versions
Amd Ryzen 3600 Firmware	Version comboam4_v2_pi_1.2.0.8

Configuration D

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Ryzen 3600 Firmware	Version comboam4pi_1.0.0.9

Running on/with	Platform Versions
Amd Ryzen 3600	All versions

Configuration E

1 vulnerable

Vulnerable Software	Affected Versions
Amd Ryzen 3600x Firmware	Version comboam4_v2_pi_1.2.0.8

Configuration F

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Ryzen 3600x Firmware	Version comboam4pi_1.0.0.9

Running on/with	Platform Versions
Amd Ryzen 3600x	All versions

Configuration G

1 vulnerable

Vulnerable Software	Affected Versions
Amd Ryzen 3600xt Firmware	Version comboam4_v2_pi_1.2.0.8

Configuration H

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Ryzen 3600xt Firmware	Version comboam4pi_1.0.0.9

Running on/with	Platform Versions
Amd Ryzen 3600xt	All versions

Configuration I

1 vulnerable

Vulnerable Software	Affected Versions
Amd Ryzen 3800x Firmware	Version comboam4_v2_pi_1.2.0.8

Configuration J

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Ryzen 3800x Firmware	Version comboam4pi_1.0.0.9

Running on/with	Platform Versions
Amd Ryzen 3800x	All versions

Configuration K

1 vulnerable

Vulnerable Software	Affected Versions
Amd Ryzen 3800xt Firmware	Version comboam4_v2_pi_1.2.0.8

Configuration L

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Ryzen 3800xt Firmware	Version comboam4pi_1.0.0.9

Running on/with	Platform Versions
Amd Ryzen 3800xt	All versions

Configuration M

1 vulnerable

Vulnerable Software	Affected Versions
Amd Ryzen 3900 Firmware	Version comboam4_v2_pi_1.2.0.8

Configuration N

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Ryzen 3900 Firmware	Version comboam4pi_1.0.0.9

Running on/with	Platform Versions
Amd Ryzen 3900	All versions

Configuration O

1 vulnerable

Vulnerable Software	Affected Versions
Amd Ryzen 3900x Firmware	Version comboam4_v2_pi_1.2.0.8

Configuration P

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Ryzen 3900x Firmware	Version comboam4pi_1.0.0.9

Running on/with	Platform Versions
Amd Ryzen 3900x	All versions

Configuration Q

1 vulnerable

Vulnerable Software	Affected Versions
Amd Ryzen 3900xt Firmware	Version comboam4_v2_pi_1.2.0.8

Configuration R

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Ryzen 3900xt Firmware	Version comboam4pi_1.0.0.9

Running on/with	Platform Versions
Amd Ryzen 3900xt	All versions

Configuration S

1 vulnerable

Vulnerable Software	Affected Versions
Amd Ryzen 3950x Firmware	Version comboam4_v2_pi_1.2.0.8

Configuration T

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Ryzen 3950x Firmware	Version comboam4pi_1.0.0.9

Running on/with	Platform Versions
Amd Ryzen 3950x	All versions

References (2)

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

Source: psirt@amd.com

Vendor Advisory

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

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

Vendor Advisory

Timeline

No history available yet.