7.5

CVE-2025-3631: ibm mq Use After Free

CVSS: 7.5v3.1HighAnalyzed
Published 11-07-2025Last modified 18-08-2025
Open JSON

Vulnerability summary

CVE-2025-3631 is a high (CVSS 7.5) Use After Free vulnerability in ibm mq. EPSS estimates a 0.38% chance of exploitation in the next 30 days, higher than 30.3% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
0.38%
0%100%
Low · +0.05 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 11-07-2025
    PublishedVulnerability first disclosed.
  2. 18-08-2025
    Last modifiedVulnerability information updated.

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 metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.38%

Chance of exploitation in the next 30 days

Percentile

30%

Versus all other CVEs

30-day change

+0.05 pp

From 0.33% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.38%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ibm2 products
  • mq≥ 9.3.2.0 CD, ≤ 9.3.5.1 CD | ≥ 9.4.0.0, ≤ 9.4.2.1 CD | ≥ 9.4.0.0 LTS, ≤ 9.4.0.11 LTS
  • mq_appliance≥ 9.3.2.0 CD, ≤ 9.3.5.2 CD | ≥ 9.4.0.0 LTS, ≤ 9.4.0.11 LTS | ≥ 9.4.1.0 CD, ≤ 9.4.2.1 CD | ≥ 9.3.2, ≤ 9.3.5.2 | ≥ 9.4.0.0, < 9.4.0.12 | ≥ 9.4.0.0, < 9.4.3 | ≥ 9.4.1.0, < 9.4.3.0

1 vendor · 2 products

References

2 links