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CVE-2021-46755

HIGHCVSS 7.5/10EPSS 0.62%

Last modified

CVE-2021-46755 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. . EPSS estimates a 0.62% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
7.5/10

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

EPSS Probability
0.62%

44.9th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

VendorProductVersions
AmdRyzen 5500 Firmwarecomboam4_v2_pi_1.2.0.8
AmdRyzen 5500 Firmwarecomboam4v2_pi_1.2.0.6
AmdRyzen 5600 Firmwarecomboam4_v2_pi_1.2.0.8
AmdRyzen 5600 Firmwarecomboam4v2_pi_1.2.0.6
AmdRyzen 5600g Firmwarecomboam4_v2_pi_1.2.0.8
AmdRyzen 5600g Firmwarecomboam4v2_pi_1.2.0.6
AmdRyzen 5600x Firmwarecomboam4_v2_pi_1.2.0.8
AmdRyzen 5600x Firmwarecomboam4v2_pi_1.2.0.6
AmdRyzen 5700g Firmwarecomboam4_v2_pi_1.2.0.8
AmdRyzen 5700g Firmwarecomboam4v2_pi_1.2.0.6
AmdRyzen 5700x Firmwarecomboam4_v2_pi_1.2.0.8
AmdRyzen 5700x Firmwarecomboam4v2_pi_1.2.0.6
AmdRyzen 5800x3d Firmwarecomboam4_v2_pi_1.2.0.8
AmdRyzen 5800x3d Firmwarecomboam4v2_pi_1.2.0.6
AmdRyzen 5800x Firmwarecomboam4_v2_pi_1.2.0.8
AmdRyzen 5800x Firmwarecomboam4v2_pi_1.2.0.6
AmdRyzen 5900x Firmwarecomboam4_v2_pi_1.2.0.8
AmdRyzen 5900x Firmwarecomboam4v2_pi_1.2.0.6
AmdRyzen 5950x Firmwarecomboam4_v2_pi_1.2.0.8
AmdRyzen 5950x Firmwarecomboam4v2_pi_1.2.0.6
AmdRyzen 3100 Firmwarecomboam4_v2_pi_1.2.0.8
AmdRyzen 3100 Firmwarecomboam4pi_1.0.0.9
AmdRyzen 3300x Firmwarecomboam4_v2_pi_1.2.0.8
AmdRyzen 3300x Firmwarecomboam4pi_1.0.0.9
AmdRyzen 3500 Firmwarecomboam4_v2_pi_1.2.0.8
AmdRyzen 3500 Firmwarecomboam4pi_1.0.0.9
AmdRyzen 3500x Firmwarecomboam4_v2_pi_1.2.0.8
AmdRyzen 3500x Firmwarecomboam4pi_1.0.0.9
AmdRyzen 3600 Firmwarecomboam4_v2_pi_1.2.0.8
AmdRyzen 3600 Firmwarecomboam4pi_1.0.0.9
AmdRyzen 3600x Firmwarecomboam4_v2_pi_1.2.0.8
AmdRyzen 3600x Firmwarecomboam4pi_1.0.0.9
AmdRyzen 3600xt Firmwarecomboam4_v2_pi_1.2.0.8
AmdRyzen 3600xt Firmwarecomboam4pi_1.0.0.9
AmdRyzen 3800x Firmwarecomboam4_v2_pi_1.2.0.8
AmdRyzen 3800x Firmwarecomboam4pi_1.0.0.9
AmdRyzen 3800xt Firmwarecomboam4_v2_pi_1.2.0.8
AmdRyzen 3800xt Firmwarecomboam4pi_1.0.0.9
AmdRyzen 3900 Firmwarecomboam4_v2_pi_1.2.0.8
AmdRyzen 3900 Firmwarecomboam4pi_1.0.0.9
AmdRyzen 3900x Firmwarecomboam4_v2_pi_1.2.0.8
AmdRyzen 3900x Firmwarecomboam4pi_1.0.0.9
AmdRyzen 3900xt Firmwarecomboam4_v2_pi_1.2.0.8
AmdRyzen 3900xt Firmwarecomboam4pi_1.0.0.9
AmdRyzen 3950x Firmwarecomboam4_v2_pi_1.2.0.8
AmdRyzen 3950x Firmwarecomboam4pi_1.0.0.9

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-46755?
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.
How severe is CVE-2021-46755?
CVE-2021-46755 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.62% probability of exploitation in the next 30 days.
How do I fix CVE-2021-46755?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-46755?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST