CVE-2021-3714: Linux Kernel

Medium severity, CVSS 5.9. EPSS: 1.5% chance of exploitation in the next 30 days.

A flaw was found in the Linux kernels memory deduplication mechanism. Previous work has shown that memory deduplication can be attacked via a local exploitation mechanism. The same technique can be used if an attacker can upload page sized files and detect the change in access time from a networked service to determine if the page has been merged.

Affected products

• Linux Linux Kernel: affected versions not specified
• Red Hat Enterprise Linux: version 6.0 only; version 7.0 only; version 8.0 only

Published 2022-08-23. Last modified 2026-06-17.