High severity · published Jul 11, 2025
CVE-2025-3631
IBM MQ denial of service
7.5
CVSS
0.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 32% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MQ
MQ · IBM
9.3.2.0 CD through 9.3.5.1 CD; 9.4.0.0 through 9.4.2.1 CD; 9.4.0.0 LTS through 9.4.0.11 LTS · source: vendor
MA
MQ Appliance · IBM
9.3.2.0 CD through 9.3.5.2 CD; 9.4.0.0 LTS through 9.4.0.11 LTS; 9.4.1.0 CD through 9.4.2.1 CD · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-3631
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-3631
Vendor Advisory
https://www.ibm.com/support/pages/node/7237025
Vendor Advisory
https://www.ibm.com/support/pages/node/7238310
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