← Database

CVE-2021-46778

MEDIUM CVSS: 5.6 Published: 2022-08-10 Modified: 2026-06-17

Description

Execution unit scheduler contention may lead to a side channel vulnerability found on AMD CPU microarchitectures codenamed “Zen 1”, “Zen 2” and “Zen 3” that use simultaneous multithreading (SMT). By measuring the contention level on scheduler queues an attacker may potentially leak sensitive information.

Affected Platforms

Amd Epyc 7551PAmd Epyc 7642Amd Ryzen 5 5625U FirmwareAmd Ryzen 5 5560U FirmwareAmd Ryzen 3 5300GeAmd Ryzen Threadripper 2970Wx FirmwareAmd Ryzen 5 3550H FirmwareAmd Epyc 7502 FirmwareAmd Ryzen 5 4500UAmd Ryzen 3 4300G Firmware

Weakness Type

CWE-203

References