CVE-2021-46778
hw: cpu: AMD: Execution Unit Scheduler Contention Side-Channel vulnerability
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · August 9, 2022
Updated · November 21, 2025
Description
A contention-based side channel vulnerability was found in hw. Some AMD CPUs using simultaneous multithreading (SMT) may allow an attacker to measure the contention level on scheduler queues, leading to potential leakage of sensitive information.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.3CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N
CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor