CVE-2025-3631

Medium

Published: 11 July 2025

Published

11 July 2025

Modified

23 July 2025

KEV Added

—

Patch

—

CVSS Score v3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Score 0.0018 39.7th percentile

Risk Priority 13 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-3631 is a medium-severity Use After Free (CWE-416) vulnerability in Ibm Mq Appliance. Its CVSS base score is 6.5 (Medium).

Operationally, ranked at the 39.7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

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.

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

ibm

mq appliance

9.3.2 — 9.3.5.2 · 9.4.0.0 — 9.4.0.12 · 9.4.0.0 — 9.4.3

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

addresses: CWE-416

Use-after-free exploits that achieve arbitrary code execution are blocked or significantly hardened by non-executable pages and ASLR.