CVE-2021-3714

MEDIUM

Linux Kernel - Information Exposure via Memory Deduplication Timing Attack

Title source: llm
STIX 2.1

Description

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.

References (4)

Core 4
Core References
Third Party Advisory x_refsource_misc
https://arxiv.org/abs/2111.08553
Technical Description, Third Party Advisory x_refsource_misc
https://arxiv.org/pdf/2111.08553.pdf
Issue Tracking, Third Party Advisory x_refsource_misc
https://bugzilla.redhat.com/show_bug.cgi?id=1931327
Third Party Advisory x_refsource_misc
https://access.redhat.com/security/cve/CVE-2021-3714

Scores

CVSS v3 5.9
EPSS 0.0007
EPSS Percentile 20.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Details

CWE
CWE-200
Status published
Products (4)
linux/linux_kernel
redhat/enterprise_linux 6.0
redhat/enterprise_linux 7.0
redhat/enterprise_linux 8.0
Published Aug 23, 2022
Tracked Since Feb 18, 2026