CVE-2020-14340 — xnio-nio
MEDIUMCVE-2020-14340 is a medium-severity (CVSS 5.9) Uncontrolled Resource Consumption vulnerability in org.jboss.xnio:xnio-nio. A fix is available for org.jboss.xnio:xnio-nio — see the affected versions and patch details below.
Uncontrolled Resource Consumption in XNIO
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
CVE-2020-14340 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.
Where this sits among everything scored
Of 385,738 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.
Real-World Exposure
org.jboss.xnio:xnio-nio☕org.jboss.xnio:xnio-nioReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.
Description
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.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | org.jboss.xnio:xnio-nio | ≥ 3.8.0.Final&&< 3.8.2.Final | 3.8.2.Finalorg.jboss.xnio:xnio-nio:3.8.2.Final |
| ☕Maven | org.jboss.xnio:xnio-nio | ≥ 3.6.0&&< 3.7.9.Final | 3.7.9.Finalorg.jboss.xnio:xnio-nio:3.7.9.Final |
Affected Products
communications cloud native core consoleoraclecommunications cloud native core network repository functionoraclecommunications cloud native core policyoraclecommunications cloud native core security edge protection proxyoraclecommunications cloud native core service communication proxyoraclecommunications cloud native core unified data repositoryoracleDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.jboss.xnio:xnio-nio, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update org.jboss.xnio:xnio-nio to 3.8.2.Final or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2020-14340 is resolved across your whole dependency graph.
Workarounds
Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.
Fixing This On Your OS
If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.
| Product | Fixed in | Advisory |
|---|---|---|
| EAP 7.3.3 | xnio | RHSA-2020:4247 |
| Red Hat Fuse 7.9 | xnio | RHSA-2021:3140 |
| Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 6 | eap7-activemq-artemis-0:2.9.0-5.redhat_00011.1.el6eap | RHSA-2020:4244 |
| Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 7 | eap7-activemq-artemis-0:2.9.0-5.redhat_00011.1.el7eap | RHSA-2020:4246 |
| Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 8 | eap7-activemq-artemis-0:2.9.0-5.redhat_00011.1.el8eap | RHSA-2020:4245 |
| Red Hat Single Sign-On 7.4.3 | xnio | RHSA-2020:4931 |
| Text-Only RHOAR | see advisory | RHSA-2020:5361 |
Frequently Asked Questions
Is CVE-2020-14340 in your dependencies?
Find it across Maven, including transitive dependencies.