Use After Free in Ibm Mq
CVE-2025-3631
An IBM MQ 9.3 and 9.4 Client connecting to an MQ Queue Manager can cause a SIGSEGV in the AMQRMPPA channel process terminating it.
Vulnerability class: Use-After-Free
EPSS: 0.002 (39.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Ibm Mq — versions 9.3.2.0 CD, 9.4.0.0, 9.4.0.0 LTS
- Ibm Mq Appliance — versions 9.3.2.0 CD, 9.4.0.0 LTS, 9.4.1.0 CD
Weakness classification (CWE)
References
- www.ibm.com/support/pages/node/7238310 (vendor-advisory, patch)
- www.ibm.com/support/pages/node/7237025 (vendor-advisory, patch)
Frequently asked questions
- What is CVE-2025-3631?
- CVE-2025-3631 is a medium-severity vulnerability in Ibm Mq, classified under Use After Free. CVSS score: 6.5/10. Published 2025-07-11.
- How severe is CVE-2025-3631?
- Medium severity. CVSS v3 base score is 6.5 out of 10.