CVE-2025-27365Network attack vector

Channel-process crash via client-triggered use-after-free

Published May 1, 2025 · Updated Aug 28, 2025

Use-after-free in IBM MQ Operator allows remote authenticated users to crash the AMQRMPPA channel process through an MQ client connection. IBM has not disclosed which freed object the process reuses; the bulletin states that establishing the client connection triggers SIGSEGV and terminates AMQRMPPA. Exploitation requires valid MQ client access over the network and interrupts the affected channel process without reported data disclosure or modification.

CVSS severity6.5
Medium
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in IBM MQ Operator allows remote authenticated users to crash the AMQRMPPA channel process through an MQ client connection. IBM has not disclosed which freed object the process reuses; the bulletin states that establishing the client connection triggers SIGSEGV and terminates AMQRMPPA. Exploitation requires valid MQ client access over the network and interrupts the affected channel process without reported data disclosure or modification.

The record

CVE
CVE-2025-27365
Published
May 1, 2025
Updated
Aug 28, 2025
Vendor
IBM
Product
IBM MQ Operator
Classifications
CWE-416, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 28, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.0.0 LTS <=2.0.29 LTS
  2. Affected versionversion=3.0.0, 3.0.1, 3.1.0, 3.1.3, 3.4.0, 3.5.0, 3.5.1 CD
  3. Affected versionversion=3.2.0 SC2 <=3.2.10 SC2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

IBM · IBM MQ Operatorversion=2.0.0 LTS <=2.0.29 LTS; version=3.0.0, 3.0.1, 3.1.0, 3.1.3, 3.4.0, 3.5.0, 3.5.1 CD; version=3.2.0 SC2 <=3.2.10 SC2

Published CVSS scores

6.5IBMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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