IBM Db2 11.5.x/12.1.x Buffer Overflow in setgid helper db2flacc
CVE-2026-10535 Published on July 30, 2026
IBM® Db2® is vulnerable to buffer overflow in setgid helper db2flacc which can lead to privilege escalation and instance compromise from an unprivileged shell
IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.4 is vulnerable to buffer overflow in setgid helper db2flacc.
Vulnerability Analysis
CVE-2026-10535 can be exploited with local system access, and does not require authorization privileges or user interaction. 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 Stack Overflow Vulnerability?
A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
CVE-2026-10535 has been classified to as a Stack Overflow vulnerability or weakness.
Products Associated with CVE-2026-10535
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Affected Versions
IBM Db2:- Version 11.5.0, <= 11.5.9 is affected.
- Version 12.1.0, <= 12.1.4 is affected.