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Vulnerability record · CVE-2021-4040 · published 24 August 2022

CVE-2021-4040: Redhat amq broker uncontrolled resource consumption vulnerability

Redhat · Amq Broker

A flaw was found in AMQ Broker. This issue can cause a partial interruption to the availability of AMQ Broker via an Out of memory (OOM) condition. This flaw allows an attacker to partially disrupt availability to the broker through a sustained attack of maliciously crafted messages. The highest threat from this vulnerability is system availability.

5.3 CVSS 3.1 Medium EPSS 3.1% · top 12.6% CWE-400 · Uncontrolled resource consumptionCWE-787 · Out-of-bounds write
5.3CVSS 3.1 base score
3.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

Description

A flaw was found in AMQ Broker. This issue can cause a partial interruption to the availability of AMQ Broker via an Out of memory (OOM) condition. This flaw allows an attacker to partially disrupt availability to the broker through a sustained attack of maliciously crafted messages. The highest threat from this vulnerability is system availability.

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

Affected products

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

References

LinkTags
https://access.redhat.com/security/cve/CVE-2021-4040 Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2028254 Issue TrackingVendor Advisory
https://github.com/apache/activemq-artemis/pull/3871/commits PatchThird Party Advisory
https://issues.apache.org/jira/browse/ARTEMIS-3593 PatchThird Party Advisory
https://access.redhat.com/security/cve/CVE-2021-4040 Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2028254 Issue TrackingVendor Advisory
https://github.com/apache/activemq-artemis/pull/3871/commits PatchThird Party Advisory
https://issues.apache.org/jira/browse/ARTEMIS-3593 PatchThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-4040), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.