What is CVE-2020-14340?

CVE-2020-14340 is a medium-severity uncontrolled resource consumption vulnerability in org.jboss.xnio:xnio-nio (maven), affecting versions >= 3.8.0.Final, <= 3.8.1.Final. It is fixed in 3.8.2.Final, 3.7.9.Final. Crafted input forces the application to consume excessive CPU, memory, or other resources, degrading or denying service.

How severe is CVE-2020-14340?

CVE-2020-14340 has a CVSS score of 5.9 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.

Which versions of org.jboss.xnio:xnio-nio are affected by CVE-2020-14340?

org.jboss.xnio:xnio-nio (maven) versions >= 3.8.0.Final, <= 3.8.1.Final is affected.

Is there a fix for CVE-2020-14340?

Yes. CVE-2020-14340 is fixed in 3.8.2.Final, 3.7.9.Final. Upgrade to this version or later.

Is CVE-2020-14340 exploitable, and should I be worried?

Whether CVE-2020-14340 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk.

What actually determines whether CVE-2020-14340 is exploitable, and how bad it is?

Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.

CVE-2020-14340 in org.jboss.xnio:xnio-nio

Q: How severe is CVE-2020-14340?

CVE-2020-14340 has a CVSS score of 5.9 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.

Q: Which versions of org.jboss.xnio:xnio-nio are affected by CVE-2020-14340?

org.jboss.xnio:xnio-nio (maven) versions >= 3.8.0.Final, <= 3.8.1.Final is affected.

Q: Is there a fix for CVE-2020-14340?

Yes. CVE-2020-14340 is fixed in 3.8.2.Final, 3.7.9.Final. Upgrade to this version or later.

Q: Is CVE-2020-14340 exploitable, and should I be worried?

Whether CVE-2020-14340 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk.

Q: What actually determines whether CVE-2020-14340 is exploitable, and how bad it is?

Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.

Q: How do I fix CVE-2020-14340?

Upgrade: org.jboss.xnio:xnio-nio to 3.8.2.Final or later, org.jboss.xnio:xnio-nio to 3.7.9.Final or later.

Summary

Uncontrolled Resource Consumption in XNIO

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.

Impact

Crafted input forces the application to consume excessive CPU, memory, or other resources, degrading or denying service. Typical impact: denial of service.

CVE-2020-14340 has a CVSS score of 5.9 (Medium). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (3.8.2.Final, 3.7.9.Final); upgrading removes the vulnerable code path.

Affected versions

org.jboss.xnio:xnio-nio (>= 3.8.0.Final, <= 3.8.1.Final) org.jboss.xnio:xnio-nio (>= 3.6.0, <= 3.7.8.Final)

Security releases

org.jboss.xnio:xnio-nio → 3.8.2.Final (maven) org.jboss.xnio:xnio-nio → 3.7.9.Final (maven)

Kodem intelligence

Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.

Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.

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Remediation advice

Upgrade the following packages to resolve this vulnerability:

org.jboss.xnio:xnio-nio to 3.8.2.Final or later; org.jboss.xnio:xnio-nio to 3.7.9.Final or later

Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.

Frequently Asked Questions

What is CVE-2020-14340? CVE-2020-14340 is a medium-severity uncontrolled resource consumption vulnerability in org.jboss.xnio:xnio-nio (maven), affecting versions >= 3.8.0.Final, <= 3.8.1.Final. It is fixed in 3.8.2.Final, 3.7.9.Final. Crafted input forces the application to consume excessive CPU, memory, or other resources, degrading or denying service.
How severe is CVE-2020-14340? CVE-2020-14340 has a CVSS score of 5.9 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
Which versions of org.jboss.xnio:xnio-nio are affected by CVE-2020-14340? org.jboss.xnio:xnio-nio (maven) versions >= 3.8.0.Final, <= 3.8.1.Final is affected.
Is there a fix for CVE-2020-14340? Yes. CVE-2020-14340 is fixed in 3.8.2.Final, 3.7.9.Final. Upgrade to this version or later.
Is CVE-2020-14340 exploitable, and should I be worried? Whether CVE-2020-14340 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
What actually determines whether CVE-2020-14340 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
How do I fix CVE-2020-14340?
- Upgrade org.jboss.xnio:xnio-nio to 3.8.2.Final or later
- Upgrade org.jboss.xnio:xnio-nio to 3.7.9.Final or later