CVE-2021-46755

HIGH

AMD Ryzen 3000/5000 Series Firmware - Denial of Service via SysHub Mapping Exhaustion

Title source: llm
STIX 2.1

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.

References (1)

Core 1
Core References

Scores

CVSS v3 7.5
EPSS 0.0043
EPSS Percentile 62.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

Status published
Products (46)
amd/ryzen_3100_firmware comboam4_v2_pi_1.2.0.8
amd/ryzen_3100_firmware comboam4pi_1.0.0.9
amd/ryzen_3300x_firmware comboam4_v2_pi_1.2.0.8
amd/ryzen_3300x_firmware comboam4pi_1.0.0.9
amd/ryzen_3500_firmware comboam4_v2_pi_1.2.0.8
amd/ryzen_3500_firmware comboam4pi_1.0.0.9
amd/ryzen_3500x_firmware comboam4_v2_pi_1.2.0.8
amd/ryzen_3500x_firmware comboam4pi_1.0.0.9
amd/ryzen_3600_firmware comboam4_v2_pi_1.2.0.8
amd/ryzen_3600_firmware comboam4pi_1.0.0.9
... and 36 more
Published May 09, 2023
Tracked Since Feb 18, 2026