CVE-2020-14339

Name: CVE-2020-14339
Creator: NVD / NIST
Published: 2020-12-03T17:15:12.207+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 0.42%

Last modified Jun 17, 2026

CVE-2020-14339 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. A flaw was found in libvirt, where it leaked a file descriptor for `/dev/mapper/control` into the QEMU process. This file descriptor allows for privileged operations to happen against the device-mapper on the host. EPSS estimates a 0.42% chance of exploitation in the next 30 days.

Description

A flaw was found in libvirt, where it leaked a file descriptor for `/dev/mapper/control` into the QEMU process. This file descriptor allows for privileged operations to happen against the device-mapper on the host. This flaw allows a malicious guest user or process to perform operations outside of their standard permissions, potentially causing serious damage to the host operating system. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

0.42%

33.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Redhat	Libvirt	>= 6.2.0, < 6.7.0
Redhat	Enterprise Linux	8.0

References

https://bugzilla.redhat.com/show_bug.cgi?id=1860069Issue Tracking, Patch, Third Party Advisory
https://security.gentoo.org/glsa/202101-22Third Party Advisory
https://security.gentoo.org/glsa/202210-06Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1860069Issue Tracking, Patch, Third Party Advisory
https://security.gentoo.org/glsa/202101-22Third Party Advisory
https://security.gentoo.org/glsa/202210-06Third Party Advisory

Timeline

Published: Dec 3, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-14339?

How severe is CVE-2020-14339?

CVE-2020-14339 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.42% probability of exploitation in the next 30 days.

How do I fix CVE-2020-14339?

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-2020-14339?

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

Scan your code now

Source: NVD / NIST