CVE-2021-3714

Name: CVE-2021-3714
Creator: NVD / NIST
Published: 2022-08-23T16:15:09.6+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.9/10EPSS 1.09%

Last modified Jun 17, 2026

CVE-2021-3714 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. 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. EPSS estimates a 1.09% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.9/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

1.09%

61.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-200

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	All versions
Redhat	Enterprise Linux	6.0
Redhat	Enterprise Linux	7.0
Redhat	Enterprise Linux	8.0

References

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

Timeline

Published: Aug 23, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-3714?

How severe is CVE-2021-3714?

CVE-2021-3714 has a CVSS score of 5.9/10 (MEDIUM severity). The EPSS model estimates a 1.09% probability of exploitation in the next 30 days.

How do I fix CVE-2021-3714?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-3714?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST