IBM MQ DoS via Improper Offset Validation in MQOPEN
CVE-2026-11829 Published on October 19, 2026

IBM MQ Buffer Overflow
IBM MQ could allow an authenticated attacker to cause a denial of service due to improper validation of offset values in MQOPEN requests.

Vendor Advisory NVD

Vulnerability Analysis

CVE-2026-11829 can be exploited with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
LOW
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
NONE
Integrity Impact:
NONE
Availability Impact:
HIGH

Weakness Type

What is a Classic Buffer Overflow Vulnerability?

The program copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. A buffer overflow condition exists when a program attempts to put more data in a buffer than it can hold, or when a program attempts to put data in a memory area outside of the boundaries of a buffer. The simplest type of error, and the most common cause of buffer overflows, is the "classic" case in which the program copies the buffer without restricting how much is copied. Other variants exist, but the existence of a classic overflow strongly suggests that the programmer is not considering even the most basic of security protections.

CVE-2026-11829 has been classified to as a Classic Buffer Overflow vulnerability or weakness.


Products Associated with CVE-2026-11829

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IBM Mq Operator
 
IBM Mq Advanced Container Images
 

Affected Versions

IBM MQ Operator: IBM MQ Advanced container images: