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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.003 (23.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 23.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
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
- IBM Mq Appliance
Weakness classification (CWE)
References
- www.ibm.com/support/pages/node/7238310 (vendor-advisory, patch, Vendor Advisory)
- www.ibm.com/support/pages/node/7237025 (vendor-advisory, patch, Vendor Advisory)
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.