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Fencer Vulns
medium 5.9

CVE-2020-14340 json

Uncontrolled Resource Consumption in XNIO

published 2021-06-02 5 y ago modified 2026-06-17 4 mo ago also GHSA-c738-77x8-wmq5 , EUVD-2021-1308

cvss
5.9
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.2%
EPSS 2.2% chance of exploitation in 30 days, percentile 82%
public exploits
0
none known

Summary

A vulnerability was discovered in XNIO where file descriptor leak caused by growing amounts of NIO Selector file handles between garbage collection cycles. It may allow the attacker to cause a denial of service. It affects XNIO versions 3.6.0.Beta1 through 3.8.1.Final.

Patch / fix

  • maven org.jboss.xnio:xnio-nio 3.7.9.Final, 3.8.2.Final
  • redhat xnio 3.7.9, 3.8.2
  • jboss-xnio Debian 14, Debian 13, Debian 12 3.8.2-1

debian advisories DEBIAN-CVE-2020-14340

  • eap7-jberet jboss enterprise application platform 7.3 1.3.7-1.Final_redhat_00001.1.el6eap
  • eap7-jgroups jboss enterprise application platform 7.3 4.1.10-1.Final_redhat_00001.1.el6eap
  • eap7-wildfly jboss enterprise application platform 7.3 7.3.3-4.GA_redhat_00004.1.el6eap
  • eap7-narayana jboss enterprise application platform 7.3 5.9.9-1.Final_redhat_00001.1.el6eap
  • eap7-undertow jboss enterprise application platform 7.3 2.0.31-1.SP1_redhat_00001.1.el6eap
  • eap7-velocity jboss enterprise application platform 7.3 2.2.0-1.redhat_00001.1.el6eap
  • eap7-hibernate jboss enterprise application platform 7.3 5.3.18-1.Final_redhat_00001.1.el6eap
  • eap7-picketbox jboss enterprise application platform 7.3 5.0.3-8.Final_redhat_00007.1.el6eap

red hat advisories RHSA-2020:4244RHSA-2020:4246RHSA-2020:4245

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-14340 updated cvss 5.9

xnio: file descriptor leak caused by growing amounts of NIO Selector file handles may lead to DoS

  • Red Hat BPM Suite 6 xnio xnio Red Hat JBoss BRMS 5 xnio xnio Red Hat JBoss BRMS 6 xnio xnio Red Hat JBoss Data Grid 6 xnio xnio Red Hat JBoss Data Grid 7 xnio xnio Red Hat JBoss Data Virtualization 6 xnio xnio
    +6 more products
    Red Hat JBoss Enterprise Application Platform 5 xnio xnio Red Hat JBoss Enterprise Application Platform 6 xnio xnio Red Hat JBoss Enterprise Application Platform Continuous Delivery xnio xnio Red Hat JBoss Fuse 6 xnio xnio Red Hat JBoss Operations Network 3 xnio xnio Red Hat JBoss SOA Platform 5 xnio xnio
    affected: no fix planned “Out of support scope”
  • Red Hat OpenShift Application Runtimes xnio xnio
    affected: no fix available
  • Red Hat EAP 7.3.3
    fixed: vendor fix RHSA-2020:4247
  • Red Hat Fuse 7.9
    fixed: vendor fix RHSA-2021:3140
  • Red Hat JBoss EAP 7.3 for BaseOS-8 eap7-artemis-native 1.0.2-3.redhat_1.el8eap, eap7-velocity 2.2.0-1.redhat_00001.1.el8eap, eap7-apache-cxf 3.3.7-1.redhat_00001.1.el8eap, eap7-snakeyaml 1.26.0-1.redhat_00001.1.el8eap, eap7-wildfly 7.3.3-4.GA_redhat_00004.1.el8eap, eap7-jberet 1.3.7-1.Final_redhat_00001.1.el8eap, +87 more
    fixed: vendor fix RHSA-2020:4245
  • Red Hat JBoss EAP 7.3 for RHEL 6 Server eap7-artemis-native 1.0.2-3.redhat_1.el6eap, eap7-velocity 2.2.0-1.redhat_00001.1.el6eap, eap7-apache-cxf 3.3.7-1.redhat_00001.1.el6eap, eap7-snakeyaml 1.26.0-1.redhat_00001.1.el6eap, eap7-wildfly 7.3.3-4.GA_redhat_00004.1.el6eap, eap7-jberet 1.3.7-1.Final_redhat_00001.1.el6eap, +87 more
    fixed: vendor fix RHSA-2020:4244
  • Red Hat JBoss EAP 7.3 for RHEL 7 Server eap7-artemis-native 1.0.2-3.redhat_1.el7eap, eap7-velocity 2.2.0-1.redhat_00001.1.el7eap, eap7-apache-cxf 3.3.7-1.redhat_00001.1.el7eap, eap7-snakeyaml 1.26.0-1.redhat_00001.1.el7eap, eap7-wildfly 7.3.3-4.GA_redhat_00004.1.el7eap, eap7-jberet 1.3.7-1.Final_redhat_00001.1.el7eap, +89 more
    fixed: vendor fix RHSA-2020:4246
  • Red Hat Single Sign-On 7.4.3
    fixed: vendor fix RHSA-2020:4931
show 2 more
  • Red Hat Text-Only RHOAR
    fixed: vendor fix RHSA-2020:5361
  • Red Hat A-MQ Clients 2 xnio xnio Red Hat Data Grid 8 xnio xnio Red Hat Decision Manager 7 xnio xnio Red Hat Integration Camel K 1 xnio xnio Red Hat Process Automation 7 xnio xnio
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.21% chance of exploitation in the next 30 days, higher than 82% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:N/A:P
GitHub 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
maven org.jboss.xnio:xnio-nio
>=3.8.0.Final, <3.8.2.Final
>=3.6.0, <3.7.9.Final
3.8.2.Final
3.7.9.Final

Affected products

  • n/a XNIO

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.