CVE-2020-4267

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-04-24 · updated 2026-06-17
Weakness: CWE-401

Description

IBM MQ and MQ Appliance 8.0, 9.1 LTS, and 9.1 CD could allow an authenticated user cause a denial of service due to a memory leak. IBM X-Force ID: 175840.

Affected products

IBM MQ: from 8.0.0.0 before 8.0.0.14; from 9.1.0.0 before 9.1.0.4 — fixed in 8.0.0.14, 9.1.0.4
IBM MQ Appliance: from 9.1.0 before 9.1.5 — fixed in 9.1.5

How to fix

Upgrade to a fixed version: IBM MQ 8.0.0.14, 9.1.0.4; IBM MQ Appliance 9.1.5. Check the vendor advisory for mitigations.

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/175840
https://www.ibm.com/support/pages/node/6195384
https://exchange.xforce.ibmcloud.com/vulnerabilities/175840
https://www.ibm.com/support/pages/node/6195384

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