CVE-2024-31919Network attack vector

Server denial of service via MQBUFMH message processing

Published Jun 28, 2024 · Updated Aug 2, 2024

Denial of service in IBM MQ 9.0 LTS through 9.3 LTS and 9.3 CD allows remote attackers to interrupt the server via messages. The server mishandles messages while an API Exit uses MQBUFMH, but IBM has not disclosed the erroneous operation or exhausted resource. Exposure requires a server configured with such an API Exit; exploitation interrupts availability without reported data disclosure or modification.

CVSS severity5.9
Medium
EPSS probability0.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in IBM MQ 9.0 LTS through 9.3 LTS and 9.3 CD allows remote attackers to interrupt the server via messages. The server mishandles messages while an API Exit uses MQBUFMH, but IBM has not disclosed the erroneous operation or exhausted resource. Exposure requires a server configured with such an API Exit; exploitation interrupts availability without reported data disclosure or modification.

The record

CVE
CVE-2024-31919
Published
Jun 28, 2024
Updated
Aug 2, 2024
Vendor
IBM
Product
IBM MQ
Classifications
CWE-770, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 28, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=9.0 LTS, 9.1 LTS, 9.2 LTS, 9.3 LTS and 9.3 CD

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IBM · IBM MQversion=9.0 LTS, 9.1 LTS, 9.2 LTS, 9.3 LTS and 9.3 CD

Published CVSS scores

5.9IBM CorporationCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1499Endpoint Denial of Service

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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