IBM Concert 1.0.03.0.0 Double Free Heap Corruption
CVE-2026-6794 Published on September 23, 2026
Multiple Vulnerabilities in IBM Concert Software
IBM Concert 1.0.0 through 3.0.0 has a double free vulnerability that exists due to incorrect memory management. A local attacker can exploit this flaw to corrupt heap memory and execute arbitrary code in the context of the affected process.
Vulnerability Analysis
CVE-2026-6794 is exploitable with local system 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 be very high.
Weakness Type
What is a Double-free Vulnerability?
The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations. When a program calls free() twice with the same argument, the program's memory management data structures become corrupted. This corruption can cause the program to crash or, in some circumstances, cause two later calls to malloc() to return the same pointer. If malloc() returns the same value twice and the program later gives the attacker control over the data that is written into this doubly-allocated memory, the program becomes vulnerable to a buffer overflow attack.
CVE-2026-6794 has been classified to as a Double-free vulnerability or weakness.
Products Associated with CVE-2026-6794
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Affected Versions
IBM Concert:- Version 1.0.0, <= 3.0.0 is affected.