CVE-2020-14339

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2022-05-24. NVD baseline CVSS 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: None knownExposed: 0

A fix is available — apply it.

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.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity88% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
36%
KEV
Not listed

Published

December 3, 2020

Last Modified

November 21, 2024

Advisory Details (3)

Auto-updated Aug 24, 2026
Patch available. Sources: redhat.
generic

libvirt: Multiple Vulnerabilities (GLSA 202210-06) — Gentoo security

https://security.gentoo.org/glsa/202210-06
generic

libvirt: Unintended access to /dev/mapper/control (GLSA 202101-22) — Gentoo security

https://security.gentoo.org/glsa/202101-22
redhat Patch Available

1860069 – (CVE-2020-14339) CVE-2020-14339 libvirt: leak of /dev/mapper/control into QEMU guests

Affected: Red Hat Enterprise Linux 5, 6, 7, and 8 are not affected by this issue as they shipped an older version of the `libvirt` packa

https://bugzilla.redhat.com/show_bug.cgi?id=1860069

Vendor Advisories for CVE-2020-14339(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatvirt:rhel-8030020200909014558.30b713e62020-11-04redhat
redhatvirt-devel:8.2-8020120200820190722.863bb0db2020-09-01redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(5 across 5 ecosystems)
Alpine:v3.12(1)
PackageVulnerable rangeFixed inDependents
libvirt—6.6.0-r0—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
libvirt—6.6.0-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
libvirt—6.6.0-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
libvirt—6.6.0-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
libvirt—6.6.0-1—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 24× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 150 total refreshes for this CVE.

  1. 2026-09-18 19:23 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2020-14339?
CVE-2020-14339 is a high vulnerability published on December 3, 2020. 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…
When was CVE-2020-14339 disclosed?
CVE-2020-14339 was first published in the National Vulnerability Database on December 3, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-14339 actively exploited?
CVE-2020-14339 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 64.0% of all scored CVEs.
What is the CVSS score of CVE-2020-14339?
CVE-2020-14339 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2020-14339?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-14339, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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