CVE-2020-14340

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: 2021-06-02 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-14340 is rated Moderate Risk (42.8/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.33%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2020-14340

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-02-17 0.52% 0.33% -0.18%
2 2026-02-15 0.31% 0.52% +0.21%
3 2025-11-21 — 0.31% —

Full EPSS history (16 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-14340

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.9 3.1 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.2 3.6 [email protected]
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2020-14340

GitHub Security Advisory for CVE-2020-14340

GHSA-c738-77x8-wmq5 · Severity: medium · Ecosystem: maven — Uncontrolled Resource Consumption in XNIO

OS Trackers for CVE-2020-14340

vendor priority summary link
debian not yet assigned CVE-2020-14340 not yet assigned priority: Debian including 1 source packages (jboss-xnio), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2020-14340
redhat medium — https://access.redhat.com/security/cve/CVE-2020-14340
ubuntu medium CVE-2020-14340 medium priority: Ubuntu including 1 source packages (jboss-xnio), 16 status rows across 16 suites (bionic, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): not-affected 10, needs-triage 4, DNE 1, ignored 1. https://ubuntu.com/security/CVE-2020-14340

Affected software / configurations for CVE-2020-14340

Vendor Product Version Raw CPE
redhat xnio >= 3.6.1, < 3.7.9 cpe:2.3:a:redhat:xnio:*:*:*:*:*:*:*:*
redhat xnio >= 3.8.0, < 3.8.2 cpe:2.3:a:redhat:xnio:*:*:*:*:*:*:*:*
redhat xnio 3.6.0 cpe:2.3:a:redhat:xnio:3.6.0:beta1:*:*:*:*:*:*
redhat xnio 3.6.0 cpe:2.3:a:redhat:xnio:3.6.0:beta2:*:*:*:*:*:*
redhat jboss_brms 5 cpe:2.3:a:redhat:jboss_brms:5:*:*:*:*:*:*:*
redhat jboss_brms 6 cpe:2.3:a:redhat:jboss_brms:6:*:*:*:*:*:*:*
redhat jboss_data_grid 6.0.0 cpe:2.3:a:redhat:jboss_data_grid:6.0.0:*:*:*:*:*:*:*
redhat jboss_data_grid 7.0.0 cpe:2.3:a:redhat:jboss_data_grid:7.0.0:*:*:*:*:*:*:*
redhat jboss_data_virtualization 6.0.0 cpe:2.3:a:redhat:jboss_data_virtualization:6.0.0:-:*:*:*:*:*:*
redhat jboss_enterprise_application_platform 5.0.0 cpe:2.3:a:redhat:jboss_enterprise_application_platform:5.0.0:*:*:*:*:*:*:*
redhat jboss_enterprise_application_platform 6.0.0 cpe:2.3:a:redhat:jboss_enterprise_application_platform:6.0.0:*:*:*:*:*:*:*
redhat jboss_fuse 6.0.0 cpe:2.3:a:redhat:jboss_fuse:6.0.0:*:*:*:*:*:*:*
redhat jboss_fuse 7.0.0 cpe:2.3:a:redhat:jboss_fuse:7.0.0:*:*:*:*:*:*:*
redhat jboss_operations_network 3.0 cpe:2.3:a:redhat:jboss_operations_network:3.0:*:*:*:*:*:*:*
redhat jboss_soa_platform 5 cpe:2.3:a:redhat:jboss_soa_platform:5:*:*:*:*:*:*:*
oracle communications_cloud_native_core_console 1.9.0 cpe:2.3:a:oracle:communications_cloud_native_core_console:1.9.0:*:*:*:*:*:*:*
oracle communications_cloud_native_core_network_repository_function 1.14.0 cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:1.14.0:*:*:*:*:*:*:*
oracle communications_cloud_native_core_policy 1.14.0 cpe:2.3:a:oracle:communications_cloud_native_core_policy:1.14.0:*:*:*:*:*:*:*
oracle communications_cloud_native_core_security_edge_protection_proxy 1.15.0 cpe:2.3:a:oracle:communications_cloud_native_core_security_edge_protection_proxy:1.15.0:*:*:*:*:*:*:*
oracle communications_cloud_native_core_service_communication_proxy 1.14.0 cpe:2.3:a:oracle:communications_cloud_native_core_service_communication_proxy:1.14.0:*:*:*:*:*:*:*
oracle communications_cloud_native_core_unified_data_repository 1.14.0 cpe:2.3:a:oracle:communications_cloud_native_core_unified_data_repository:1.14.0:*:*:*:*:*:*:*

References for CVE-2020-14340

cvelogic Threat Intelligence