NVD / CVE Program· CNA redhat

CVE-2020-14340: A vulnerability was discovered in XNIO where file descriptor leak caused by growing amounts of NIO Selector file handles between garbage…

MediumCVSS 5.9 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 24/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 2.2% (FIRST EPSS); higher than 82.8% of all records.
Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. Special conditions such as timing or configuration are required.
Fixed version: jboss-xnio (Debian:12) 3.8.2-1; org.jboss.xnio:xnio-nio (Maven) 3.7.9.Final, 3.8.2.Final; eap7-activemq-artemis (Red Hat:jboss_enterprise_application_platform:7.3::el6) 0:2.9.0-5.redhat_00011.1.el6eap.

Low priority for now. Upgrade to jboss-xnio (Debian:12) 3.8.2-1; org.jboss.xnio:xnio-nio (Maven) 3.7.9.Final, 3.8.2.Final; eap7-activemq-artemis (Red Hat:jboss_enterprise_application_platform:7.3::el6) 0:2.9.0-5.redhat_00011.1.el6eap or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

Published: Jun 2, 2021
Updated: Jun 16, 2026
EPSS: 2.2% · 82th percentile
CWE: CWE-400

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 23 / 40 · 5.9 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 1 / 30 · 2.2%

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
redhat	xnio	cpe:2.3:a:redhat:xnio
redhat	jboss brms	cpe:2.3:a:redhat:jboss_brms
redhat	jboss data grid	cpe:2.3:a:redhat:jboss_data_grid
redhat	jboss data virtualization	cpe:2.3:a:redhat:jboss_data_virtualization
redhat	jboss enterprise application platform	cpe:2.3:a:redhat:jboss_enterprise_application_platform
redhat	jboss fuse	cpe:2.3:a:redhat:jboss_fuse
redhat	jboss operations network	cpe:2.3:a:redhat:jboss_operations_network
redhat	jboss soa platform	cpe:2.3:a:redhat:jboss_soa_platform
oracle	communications cloud native core console	cpe:2.3:a:oracle:communications_cloud_native_core_console
oracle	communications cloud native core network repository function	cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function
oracle	communications cloud native core policy	cpe:2.3:a:oracle:communications_cloud_native_core_policy
oracle	communications cloud native core security edge protection proxy	cpe:2.3:a:oracle:communications_cloud_native_core_security_edge_protection_proxy

and 2 more

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

n/a XNIO
- xnio 3.7.9.Final, xnio 3.8.2.Final, xnio 3.9.0.Finalaffected

Affected versions · NVD (20)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

oracle communications cloud native core console1.9.0
oracle communications cloud native core network repository function1.14.0
oracle communications cloud native core policy1.14.0
oracle communications cloud native core security edge protection proxy1.15.0
oracle communications cloud native core service communication proxy1.14.0
oracle communications cloud native core unified data repository1.14.0
redhat jboss brms5
redhat jboss brms6
redhat jboss data grid6.0.0
redhat jboss data grid7.0.0
redhat jboss data virtualization6.0.0
redhat jboss enterprise application platform5.0.0
redhat jboss enterprise application platform6.0.0
redhat jboss fuse6.0.0
redhat jboss fuse7.0.0
redhat jboss operations network3.0
redhat jboss soa platform5
redhat xnio3.6.1 and later · before 3.7.9
redhat xnio3.8.0 and later · before 3.8.2
redhat xnio3.6.0

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

+96

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
debian:jboss-xnio	3.8.2-1 · Debian:12	Package registry (OSV)
Maven:org.jboss.xnio:xnio-nio	3.7.9.Final	Package registry (OSV)
Maven:org.jboss.xnio:xnio-nio	3.8.2.Final	Package registry (OSV)
red hat:eap7-activemq-artemis	0:2.9.0-5.redhat_00011.1.el6eap · Red Hat:jboss_enterprise_application_platform:7.3::el6	Package registry (OSV)
red hat:eap7-activemq-artemis-cli	0:2.9.0-5.redhat_00011.1.el6eap · Red Hat:jboss_enterprise_application_platform:7.3::el6	Package registry (OSV)
red hat:eap7-activemq-artemis-commons	0:2.9.0-5.redhat_00011.1.el6eap · Red Hat:jboss_enterprise_application_platform:7.3::el6	Package registry (OSV)
red hat:eap7-activemq-artemis-core-client	0:2.9.0-5.redhat_00011.1.el6eap · Red Hat:jboss_enterprise_application_platform:7.3::el6	Package registry (OSV)
red hat:eap7-activemq-artemis-dto	0:2.9.0-5.redhat_00011.1.el6eap · Red Hat:jboss_enterprise_application_platform:7.3::el6	Package registry (OSV)
red hat:eap7-activemq-artemis-hornetq-protocol	0:2.9.0-5.redhat_00011.1.el6eap · Red Hat:jboss_enterprise_application_platform:7.3::el6	Package registry (OSV)
red hat:eap7-activemq-artemis-hqclient-protocol	0:2.9.0-5.redhat_00011.1.el6eap · Red Hat:jboss_enterprise_application_platform:7.3::el6	Package registry (OSV)
red hat:eap7-activemq-artemis-jdbc-store	0:2.9.0-5.redhat_00011.1.el6eap · Red Hat:jboss_enterprise_application_platform:7.3::el6	Package registry (OSV)
red hat:eap7-activemq-artemis-jms-client	0:2.9.0-5.redhat_00011.1.el6eap · Red Hat:jboss_enterprise_application_platform:7.3::el6	Package registry (OSV)
red hat:eap7-activemq-artemis-jms-server	0:2.9.0-5.redhat_00011.1.el6eap · Red Hat:jboss_enterprise_application_platform:7.3::el6	Package registry (OSV)
red hat:eap7-activemq-artemis-journal	0:2.9.0-5.redhat_00011.1.el6eap · Red Hat:jboss_enterprise_application_platform:7.3::el6	Package registry (OSV)
red hat:eap7-activemq-artemis-native	1:1.0.2-1.redhat_00001.1.el6eap · Red Hat:jboss_enterprise_application_platform:7.3::el6	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
No user action is required.
Special conditions such as timing or configuration are required.

If successful

Confidentiality: none
Integrity: none
Availability: high · the service can be disrupted

Attack vector: Network
Attack complexity: High
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: None
Integrity impact: None
Availability impact: High

Weakness class (CWE)

CWE-400 · Uncontrolled Resource Consumption

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Root cause

Code that parses nested structures sets no depth or size limit. A small input can turn into a disproportionate processing load.

The bug in code

The whole CWE-400 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1function expand(node) {
2  return node.children.map(expand);
3}

Fixed

1const MAX_DEPTH = 32;
2function expand(node, depth = 0) {
3  if (depth > MAX_DEPTH) throw new Error("too deep");
4  return node.children.map((c) => expand(c, depth + 1));
5}

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

Endpoint Denial of ServiceT1499

Change log (1)

Fix✗ → ✓Sep 28, 2026, 10:45 PM UTC

For records you follow, these changes also arrive as notifications. →

References

bugzilla.redhat.com/show_bug.cgi?id=1860218

Show all references (2 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records

Ecosystem	Package	Affected range	Fix
Debian:12	jboss-xnio	before 3.8.2-1	3.8.2-1
Maven	org.jboss.xnio:xnio-nio	from 3.6.0 · before 3.7.9.Final	3.7.9.Final
Maven	org.jboss.xnio:xnio-nio	from 3.8.0.Final · before 3.8.2.Final	3.8.2.Final
Red Hat:jboss_enterprise_application_platform:7.3::el6	eap7-activemq-artemis	before 0:2.9.0-5.redhat_00011.1.el6eap	0:2.9.0-5.redhat_00011.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.3::el6	eap7-activemq-artemis-cli	before 0:2.9.0-5.redhat_00011.1.el6eap	0:2.9.0-5.redhat_00011.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.3::el6	eap7-activemq-artemis-commons	before 0:2.9.0-5.redhat_00011.1.el6eap	0:2.9.0-5.redhat_00011.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.3::el6	eap7-activemq-artemis-core-client	before 0:2.9.0-5.redhat_00011.1.el6eap	0:2.9.0-5.redhat_00011.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.3::el6	eap7-activemq-artemis-dto	before 0:2.9.0-5.redhat_00011.1.el6eap	0:2.9.0-5.redhat_00011.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.3::el6	eap7-activemq-artemis-hornetq-protocol	before 0:2.9.0-5.redhat_00011.1.el6eap	0:2.9.0-5.redhat_00011.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.3::el6	eap7-activemq-artemis-hqclient-protocol	before 0:2.9.0-5.redhat_00011.1.el6eap	0:2.9.0-5.redhat_00011.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.3::el6	eap7-activemq-artemis-jdbc-store	before 0:2.9.0-5.redhat_00011.1.el6eap	0:2.9.0-5.redhat_00011.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.3::el6	eap7-activemq-artemis-jms-client	before 0:2.9.0-5.redhat_00011.1.el6eap	0:2.9.0-5.redhat_00011.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.3::el6	eap7-activemq-artemis-jms-server	before 0:2.9.0-5.redhat_00011.1.el6eap	0:2.9.0-5.redhat_00011.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.3::el6	eap7-activemq-artemis-journal	before 0:2.9.0-5.redhat_00011.1.el6eap	0:2.9.0-5.redhat_00011.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.3::el6	eap7-activemq-artemis-native	before 1:1.0.2-1.redhat_00001.1.el6eap	1:1.0.2-1.redhat_00001.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.3::el6	eap7-activemq-artemis-ra	before 0:2.9.0-5.redhat_00011.1.el6eap	0:2.9.0-5.redhat_00011.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.3::el6	eap7-activemq-artemis-selector	before 0:2.9.0-5.redhat_00011.1.el6eap	0:2.9.0-5.redhat_00011.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.3::el6	eap7-activemq-artemis-server	before 0:2.9.0-5.redhat_00011.1.el6eap	0:2.9.0-5.redhat_00011.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.3::el6	eap7-activemq-artemis-service-extensions	before 0:2.9.0-5.redhat_00011.1.el6eap	0:2.9.0-5.redhat_00011.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.3::el6	eap7-activemq-artemis-tools	before 0:2.9.0-5.redhat_00011.1.el6eap	0:2.9.0-5.redhat_00011.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.3::el6	eap7-apache-commons-codec	before 0:1.14.0-1.redhat_00001.1.el6eap	0:1.14.0-1.redhat_00001.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.3::el6	eap7-apache-commons-lang	before 0:3.10.0-1.redhat_00001.1.el6eap	0:3.10.0-1.redhat_00001.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.3::el6	eap7-apache-cxf	before 0:3.3.7-1.redhat_00001.1.el6eap	0:3.3.7-1.redhat_00001.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.3::el6	eap7-apache-cxf-rt	before 0:3.3.7-1.redhat_00001.1.el6eap	0:3.3.7-1.redhat_00001.1.el6eap