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Vulnerability record · CVE-2020-25689 · published 2 November 2020

CVE-2020-25689: Redhat wildfly memory leak vulnerability

Redhat · Wildfly

A memory leak flaw was found in WildFly in all versions up to 21.0.0.Final, where host-controller tries to reconnect in a loop, generating new connections which are not properly closed while not able to connect to domain-controller. This flaw allows an attacker to cause an Out of memory (OOM) issue, leading to a denial of service. The highest threat from this vulnerability is to system availability.

6.5 CVSS 3.1 Medium EPSS 1.5% · top 26.8% CWE-401 · Memory leak
6.5CVSS 3.1 base score, v2 6.8
1.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
10Affected product versions listed by NVD
4References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

A memory leak flaw was found in WildFly in all versions up to 21.0.0.Final, where host-controller tries to reconnect in a loop, generating new connections which are not properly closed while not able to connect to domain-controller. This flaw allows an attacker to cause an Out of memory (OOM) issue, leading to a denial of service. The highest threat from this vulnerability is to system availability.

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

Affected products

10 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-25689 ExploitIssue TrackingPatchVendor Advisory
https://security.netapp.com/advisory/ntap-20201123-0006/ Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-25689 ExploitIssue TrackingPatchVendor Advisory
https://security.netapp.com/advisory/ntap-20201123-0006/ Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2020-25689), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.