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Vulnerability · Published Jul 11, 2025 · Assigned by ibm

CVE-2025-3631IBM MQ denial of service

Medium 6.5

In plain English

A medium-severity use-after-free in MQ from IBM. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 32% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.4%top 68.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

VendorProductVersions
IBM MQ 9.3.2.0 CD – through 9.3.5.1 CD9.4.0.0 – through 9.4.2.1 CD9.4.0.0 LTS – through 9.4.0.11 LTS
IBM MQ Appliance 9.3.2.0 CD – through 9.3.5.2 CD9.4.0.0 LTS – through 9.4.0.11 LTS9.4.1.0 CD – through 9.4.2.1 CD

Weakness: CWE-416 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References