CVE intelligence and bounded remediation

CVE-2020-14340 — Redhat Xnio security vulnerability

Medium CVSS 5.9

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.

Severity: Medium
CVSS: 5.9 (3.1)
Published: 2021-06-02
CISA KEV: Not currently listed
Ecosystem: software/application
Weaknesses: CWE-400

Affected products

redhat / xnio
redhat / xnio / 3.6.0
redhat / jboss_brms / 5
redhat / jboss_brms / 6
redhat / jboss_data_grid / 6.0.0
redhat / jboss_data_grid / 7.0.0

Showing 6 representative product identities from 21 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Resource exhaustion and denial of service

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

Identify attacker-influenced work factors including input size, nesting, compression, fan-out, regex cost, allocation, recursion, retries, and connection lifetime.
Map per-request and shared CPU, memory, disk, descriptor, thread, queue, and downstream-service limits.
Determine whether authentication, tenancy, quotas, and rate controls apply before expensive processing begins.

Remediate safely

Bound input size, nesting, expansion, work, concurrency, queue depth, retries, and execution time before resource-intensive processing.
Release resources on every success, error, cancellation, and timeout path and use backpressure instead of unbounded buffering.
Update affected components and add small deterministic tests that assert resource ceilings rather than exhausting a host.

Authoritative sources

Complete CVE record and remediation plan

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