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Medium, CVSS 5.9

Uncontrolled Resource Consumption in XNIO

CVE-2020-14340GHSA-c738-77x8-wmq5

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (org.jboss.xnio:xnio-nio 3.8.2.Final, 3.7.9.Final), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

  • Maven org.jboss.xnio:xnio-nio

    Affected
    >= 3.8.0.Final, <= 3.8.1.Final>= 3.6.0, <= 3.7.8.Final
    Fixed in
    3.7.9.Final, 3.8.2.Final

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
5.9 · CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
  • CVE-2020-14340: 2.21% estimated exploitation activity in the next 30 days; percentile 82.63 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

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.

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 1 · created ·

    Published from ghsa record GHSA-c738-77x8-wmq5

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2020-14340

Advisory: Uncontrolled Resource Consumption in XNIO
IDs: CVE-2020-14340, GHSA-c738-77x8-wmq5
Record: https://patchnext.com/advisories/cve-2020-14340 (revision 1, source checked 26 Oct 2026, 16:06 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.9)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: org.jboss.xnio:xnio-nio 3.8.2.Final, 3.7.9.Final. A vendor fix does not mean a deployment is fixed.

## Affected components
- Maven org.jboss.xnio:xnio-nio: affected >= 3.8.0.Final, <= 3.8.1.Final; >= 3.6.0, <= 3.7.8.Final; fixed in 3.7.9.Final, 3.8.2.Final

## Suggested inspection (read-only)
- Maven org.jboss.xnio:xnio-nio: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on org.jboss.xnio:xnio-nio.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-c738-77x8-wmq5 (GitHub-reviewed advisory GHSA-c738-77x8-wmq5 lists affected ranges: Maven org.jboss.xnio:xnio-nio >=3.8.0.Final =3.6.0 <=3.7.8.Final)

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