CVE-2021-46755
First published: Tue May 09 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.
Credit: psirt@amd.com psirt@amd.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| AMD Ryzen 5 5500 Firmware | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 5500 | ||
| AMD Ryzen 5 5500 Firmware | =comboam4v2_pi_1.2.0.6 | |
| AMD Ryzen 5 5600 Firmware | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 5 5600 | ||
| AMD Ryzen 5 5600 Firmware | =comboam4v2_pi_1.2.0.6 | |
| AMD Ryzen 5 5600G Firmware | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 5600G Firmware | ||
| AMD Ryzen 5 5600G Firmware | =comboam4v2_pi_1.2.0.6 | |
| AMD Ryzen 5 5600X Firmware | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 5 5600X | ||
| AMD Ryzen 5 5600X Firmware | =comboam4v2_pi_1.2.0.6 | |
| AMD Ryzen 5 5700G Firmware | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 5 5700G | ||
| AMD Ryzen 5 5700G Firmware | =comboam4v2_pi_1.2.0.6 | |
| AMD Ryzen 7 5700X Firmware | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 5700X Firmware | ||
| AMD Ryzen 7 5700X Firmware | =comboam4v2_pi_1.2.0.6 | |
| AMD Ryzen 7 5800X3D Firmware | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 7 5800X3D | ||
| AMD Ryzen 7 5800X3D Firmware | =comboam4v2_pi_1.2.0.6 | |
| AMD Ryzen 5800X | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 7 5800X | ||
| AMD Ryzen 5800X | =comboam4v2_pi_1.2.0.6 | |
| AMD Ryzen 9 5900X Firmware | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 9 5900X | ||
| AMD Ryzen 9 5900X Firmware | =comboam4v2_pi_1.2.0.6 | |
| AMD Ryzen 9 5950X | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 9 5950X | ||
| AMD Ryzen 9 5950X | =comboam4v2_pi_1.2.0.6 | |
| AMD Ryzen 3 3100 Firmware | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 3100 Firmware | ||
| AMD Ryzen 3 3100 Firmware | =comboam4pi_1.0.0.9 | |
| AMD Ryzen 3 3300X Firmware | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 3300X Firmware | ||
| AMD Ryzen 3 3300X Firmware | =comboam4pi_1.0.0.9 | |
| AMD Ryzen 5 3500 | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 5 3500 | ||
| AMD Ryzen 5 3500 | =comboam4pi_1.0.0.9 | |
| AMD Ryzen 5 3500X Firmware | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 5 3500X | ||
| AMD Ryzen 5 3500X Firmware | =comboam4pi_1.0.0.9 | |
| AMD Ryzen 5 3600 firmware | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 5 3600 | ||
| AMD Ryzen 5 3600 firmware | =comboam4pi_1.0.0.9 | |
| AMD Ryzen 5 3600X Firmware | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 5 3600X | ||
| AMD Ryzen 5 3600X Firmware | =comboam4pi_1.0.0.9 | |
| AMD Ryzen 5 3600XT firmware | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 5 3600XT | ||
| AMD Ryzen 5 3600XT firmware | =comboam4pi_1.0.0.9 | |
| AMD Ryzen 7 3800X Firmware | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 7 3800X | ||
| AMD Ryzen 7 3800X Firmware | =comboam4pi_1.0.0.9 | |
| AMD Ryzen 7 3800XT Firmware | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 7 3800XT | ||
| AMD Ryzen 7 3800XT Firmware | =comboam4pi_1.0.0.9 | |
| AMD Ryzen 9 3900 firmware | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 9 3900 | ||
| AMD Ryzen 9 3900 firmware | =comboam4pi_1.0.0.9 | |
| AMD Ryzen 9 3900X Firmware | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 9 3900X Firmware | ||
| AMD Ryzen 9 3900X Firmware | =comboam4pi_1.0.0.9 | |
| AMD Ryzen 9 3900XT Firmware | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 9 3900XT | ||
| AMD Ryzen 9 3900XT Firmware | =comboam4pi_1.0.0.9 | |
| AMD Ryzen 3950X Firmware | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 3950X Firmware | ||
| AMD Ryzen 3950X Firmware | =comboam4pi_1.0.0.9 | |
| All of | ||
| AMD Ryzen 5 5500 Firmware | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 5500 | ||
| All of | ||
| AMD Ryzen 5 5500 Firmware | =comboam4v2_pi_1.2.0.6 | |
| AMD Ryzen 5500 | ||
| All of | ||
| AMD Ryzen 5 5600 Firmware | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 5 5600 | ||
| All of | ||
| AMD Ryzen 5 5600 Firmware | =comboam4v2_pi_1.2.0.6 | |
| AMD Ryzen 5 5600 | ||
| All of | ||
| AMD Ryzen 5 5600G Firmware | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 5600G Firmware | ||
| All of | ||
| AMD Ryzen 5 5600G Firmware | =comboam4v2_pi_1.2.0.6 | |
| AMD Ryzen 5600G Firmware | ||
| All of | ||
| AMD Ryzen 5 5600X Firmware | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 5 5600X | ||
| All of | ||
| AMD Ryzen 5 5600X Firmware | =comboam4v2_pi_1.2.0.6 | |
| AMD Ryzen 5 5600X | ||
| All of | ||
| AMD Ryzen 5 5700G Firmware | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 5 5700G | ||
| All of | ||
| AMD Ryzen 5 5700G Firmware | =comboam4v2_pi_1.2.0.6 | |
| AMD Ryzen 5 5700G | ||
| All of | ||
| AMD Ryzen 7 5700X Firmware | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 5700X Firmware | ||
| All of | ||
| AMD Ryzen 7 5700X Firmware | =comboam4v2_pi_1.2.0.6 | |
| AMD Ryzen 5700X Firmware | ||
| All of | ||
| AMD Ryzen 7 5800X3D Firmware | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 7 5800X3D | ||
| All of | ||
| AMD Ryzen 7 5800X3D Firmware | =comboam4v2_pi_1.2.0.6 | |
| AMD Ryzen 7 5800X3D | ||
| All of | ||
| AMD Ryzen 5800X | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 7 5800X | ||
| All of | ||
| AMD Ryzen 5800X | =comboam4v2_pi_1.2.0.6 | |
| AMD Ryzen 7 5800X | ||
| All of | ||
| AMD Ryzen 9 5900X Firmware | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 9 5900X | ||
| All of | ||
| AMD Ryzen 9 5900X Firmware | =comboam4v2_pi_1.2.0.6 | |
| AMD Ryzen 9 5900X | ||
| All of | ||
| AMD Ryzen 9 5950X | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 9 5950X | ||
| All of | ||
| AMD Ryzen 9 5950X | =comboam4v2_pi_1.2.0.6 | |
| AMD Ryzen 9 5950X | ||
| All of | ||
| AMD Ryzen 3 3100 Firmware | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 3100 Firmware | ||
| All of | ||
| AMD Ryzen 3 3100 Firmware | =comboam4pi_1.0.0.9 | |
| AMD Ryzen 3100 Firmware | ||
| All of | ||
| AMD Ryzen 3 3300X Firmware | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 3300X Firmware | ||
| All of | ||
| AMD Ryzen 3 3300X Firmware | =comboam4pi_1.0.0.9 | |
| AMD Ryzen 3300X Firmware | ||
| All of | ||
| AMD Ryzen 5 3500 | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 5 3500 | ||
| All of | ||
| AMD Ryzen 5 3500 | =comboam4pi_1.0.0.9 | |
| AMD Ryzen 5 3500 | ||
| All of | ||
| AMD Ryzen 5 3500X Firmware | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 5 3500X | ||
| All of | ||
| AMD Ryzen 5 3500X Firmware | =comboam4pi_1.0.0.9 | |
| AMD Ryzen 5 3500X | ||
| All of | ||
| AMD Ryzen 5 3600 firmware | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 5 3600 | ||
| All of | ||
| AMD Ryzen 5 3600 firmware | =comboam4pi_1.0.0.9 | |
| AMD Ryzen 5 3600 | ||
| All of | ||
| AMD Ryzen 5 3600X Firmware | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 5 3600X | ||
| All of | ||
| AMD Ryzen 5 3600X Firmware | =comboam4pi_1.0.0.9 | |
| AMD Ryzen 5 3600X | ||
| All of | ||
| AMD Ryzen 5 3600XT firmware | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 5 3600XT | ||
| All of | ||
| AMD Ryzen 5 3600XT firmware | =comboam4pi_1.0.0.9 | |
| AMD Ryzen 5 3600XT | ||
| All of | ||
| AMD Ryzen 7 3800X Firmware | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 7 3800X | ||
| All of | ||
| AMD Ryzen 7 3800X Firmware | =comboam4pi_1.0.0.9 | |
| AMD Ryzen 7 3800X | ||
| All of | ||
| AMD Ryzen 7 3800XT Firmware | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 7 3800XT | ||
| All of | ||
| AMD Ryzen 7 3800XT Firmware | =comboam4pi_1.0.0.9 | |
| AMD Ryzen 7 3800XT | ||
| All of | ||
| AMD Ryzen 9 3900 firmware | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 9 3900 | ||
| All of | ||
| AMD Ryzen 9 3900 firmware | =comboam4pi_1.0.0.9 | |
| AMD Ryzen 9 3900 | ||
| All of | ||
| AMD Ryzen 9 3900X Firmware | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 9 3900X Firmware | ||
| All of | ||
| AMD Ryzen 9 3900X Firmware | =comboam4pi_1.0.0.9 | |
| AMD Ryzen 9 3900X Firmware | ||
| All of | ||
| AMD Ryzen 9 3900XT Firmware | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 9 3900XT | ||
| All of | ||
| AMD Ryzen 9 3900XT Firmware | =comboam4pi_1.0.0.9 | |
| AMD Ryzen 9 3900XT | ||
| All of | ||
| AMD Ryzen 3950X Firmware | =comboam4_v2_pi_1.2.0.8 | |
| AMD Ryzen 3950X Firmware | ||
| All of | ||
| AMD Ryzen 3950X Firmware | =comboam4pi_1.0.0.9 | |
| AMD Ryzen 3950X Firmware |
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Frequently Asked Questions
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.
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.
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.
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.
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.
- agent/type
- agent/references
- agent/severity
- agent/description
- agent/first-publish-date
- agent/event
- collector/mitre-cve
- source/MITRE
- agent/author
- agent/last-modified-date
- agent/source
- agent/softwarecombine
- agent/tags
- collector/nvd-index
- agent/software-canonical-lookup-request
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- vendor/amd
- canonical/amd ryzen 5 5500 firmware
- version/amd ryzen 5 5500 firmware/comboam4_v2_pi_1.2.0.8
- canonical/amd ryzen 5500
- version/amd ryzen 5 5500 firmware/comboam4v2_pi_1.2.0.6
- canonical/amd ryzen 5 5600 firmware
- version/amd ryzen 5 5600 firmware/comboam4_v2_pi_1.2.0.8
- canonical/amd ryzen 5 5600
- version/amd ryzen 5 5600 firmware/comboam4v2_pi_1.2.0.6
- canonical/amd ryzen 5 5600g firmware
- version/amd ryzen 5 5600g firmware/comboam4_v2_pi_1.2.0.8
- canonical/amd ryzen 5600g firmware
- version/amd ryzen 5 5600g firmware/comboam4v2_pi_1.2.0.6
- canonical/amd ryzen 5 5600x firmware
- version/amd ryzen 5 5600x firmware/comboam4_v2_pi_1.2.0.8
- canonical/amd ryzen 5 5600x
- version/amd ryzen 5 5600x firmware/comboam4v2_pi_1.2.0.6
- canonical/amd ryzen 5 5700g firmware
- version/amd ryzen 5 5700g firmware/comboam4_v2_pi_1.2.0.8
- canonical/amd ryzen 5 5700g
- version/amd ryzen 5 5700g firmware/comboam4v2_pi_1.2.0.6
- canonical/amd ryzen 7 5700x firmware
- version/amd ryzen 7 5700x firmware/comboam4_v2_pi_1.2.0.8
- canonical/amd ryzen 5700x firmware
- version/amd ryzen 7 5700x firmware/comboam4v2_pi_1.2.0.6
- canonical/amd ryzen 7 5800x3d firmware
- version/amd ryzen 7 5800x3d firmware/comboam4_v2_pi_1.2.0.8
- canonical/amd ryzen 7 5800x3d
- version/amd ryzen 7 5800x3d firmware/comboam4v2_pi_1.2.0.6
- canonical/amd ryzen 5800x
- version/amd ryzen 5800x/comboam4_v2_pi_1.2.0.8
- canonical/amd ryzen 7 5800x
- version/amd ryzen 5800x/comboam4v2_pi_1.2.0.6
- canonical/amd ryzen 9 5900x firmware
- version/amd ryzen 9 5900x firmware/comboam4_v2_pi_1.2.0.8
- canonical/amd ryzen 9 5900x
- version/amd ryzen 9 5900x firmware/comboam4v2_pi_1.2.0.6
- canonical/amd ryzen 9 5950x
- version/amd ryzen 9 5950x/comboam4_v2_pi_1.2.0.8
- version/amd ryzen 9 5950x/comboam4v2_pi_1.2.0.6
- canonical/amd ryzen 3 3100 firmware
- version/amd ryzen 3 3100 firmware/comboam4_v2_pi_1.2.0.8
- canonical/amd ryzen 3100 firmware
- version/amd ryzen 3 3100 firmware/comboam4pi_1.0.0.9
- canonical/amd ryzen 3 3300x firmware
- version/amd ryzen 3 3300x firmware/comboam4_v2_pi_1.2.0.8
- canonical/amd ryzen 3300x firmware
- version/amd ryzen 3 3300x firmware/comboam4pi_1.0.0.9
- canonical/amd ryzen 5 3500
- version/amd ryzen 5 3500/comboam4_v2_pi_1.2.0.8
- version/amd ryzen 5 3500/comboam4pi_1.0.0.9
- canonical/amd ryzen 5 3500x firmware
- version/amd ryzen 5 3500x firmware/comboam4_v2_pi_1.2.0.8
- canonical/amd ryzen 5 3500x
- version/amd ryzen 5 3500x firmware/comboam4pi_1.0.0.9
- canonical/amd ryzen 5 3600 firmware
- version/amd ryzen 5 3600 firmware/comboam4_v2_pi_1.2.0.8
- canonical/amd ryzen 5 3600
- version/amd ryzen 5 3600 firmware/comboam4pi_1.0.0.9
- canonical/amd ryzen 5 3600x firmware
- version/amd ryzen 5 3600x firmware/comboam4_v2_pi_1.2.0.8
- canonical/amd ryzen 5 3600x
- version/amd ryzen 5 3600x firmware/comboam4pi_1.0.0.9
- canonical/amd ryzen 5 3600xt firmware
- version/amd ryzen 5 3600xt firmware/comboam4_v2_pi_1.2.0.8
- canonical/amd ryzen 5 3600xt
- version/amd ryzen 5 3600xt firmware/comboam4pi_1.0.0.9
- canonical/amd ryzen 7 3800x firmware
- version/amd ryzen 7 3800x firmware/comboam4_v2_pi_1.2.0.8
- canonical/amd ryzen 7 3800x
- version/amd ryzen 7 3800x firmware/comboam4pi_1.0.0.9
- canonical/amd ryzen 7 3800xt firmware
- version/amd ryzen 7 3800xt firmware/comboam4_v2_pi_1.2.0.8
- canonical/amd ryzen 7 3800xt
- version/amd ryzen 7 3800xt firmware/comboam4pi_1.0.0.9
- canonical/amd ryzen 9 3900 firmware
- version/amd ryzen 9 3900 firmware/comboam4_v2_pi_1.2.0.8
- canonical/amd ryzen 9 3900
- version/amd ryzen 9 3900 firmware/comboam4pi_1.0.0.9
- canonical/amd ryzen 9 3900x firmware
- version/amd ryzen 9 3900x firmware/comboam4_v2_pi_1.2.0.8
- version/amd ryzen 9 3900x firmware/comboam4pi_1.0.0.9
- canonical/amd ryzen 9 3900xt firmware
- version/amd ryzen 9 3900xt firmware/comboam4_v2_pi_1.2.0.8
- canonical/amd ryzen 9 3900xt
- version/amd ryzen 9 3900xt firmware/comboam4pi_1.0.0.9
- canonical/amd ryzen 3950x firmware
- version/amd ryzen 3950x firmware/comboam4_v2_pi_1.2.0.8
- version/amd ryzen 3950x firmware/comboam4pi_1.0.0.9