CVE-2024-40680

Service crash via improper memory allocation

Published Sep 7, 2024 · Updated Oct 31, 2024

Improper memory allocation in the IBM MQ Server component in IBM MQ 9.3 CD and 9.4 LTS/CD allows local users to crash the service. IBM identifies the failure as a segmentation fault caused by improper memory allocation but does not disclose the responsible function or attacker-controlled input. Local access is required, and successful exploitation interrupts the affected IBM MQ Server process without reported data disclosure or modification.

CVSS severity6.2
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper memory allocation in the IBM MQ Server component in IBM MQ 9.3 CD and 9.4 LTS/CD allows local users to crash the service. IBM identifies the failure as a segmentation fault caused by improper memory allocation but does not disclose the responsible function or attacker-controlled input. Local access is required, and successful exploitation interrupts the affected IBM MQ Server process without reported data disclosure or modification.

The record

CVE
CVE-2024-40680
Published
Sep 7, 2024
Updated
Oct 31, 2024
Vendor
IBM
Product
IBM MQ
Classifications
CWE-770, CWE-789, T1489
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 7, 2024CVE publishedPublication date reported by the CVE source.
  2. Oct 31, 2024Record 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=9.3 CD, 9.4 LTS, 9.4 CD

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

IBM · IBM MQversion=9.3 CD, 9.4 LTS, 9.4 CD

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
6.2IBMCVSS:3.0/AV:L/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)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
CWE-789Memory Allocation with Excessive Size Value
T1489Service Stop

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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