Executive brief
IBM AIX 7.2 and 7.3, and IBM PowerVM VIOS 4.1 contain a heap-based buffer overflow vulnerability that allows a local attacker to execute arbitrary code with system-level privileges. This vulnerability could be exploited by an authenticated user on the system to gain full control of the affected AIX or VIOS infrastructure, leading to data theft, system compromise, and operational disruption.
Technical details
This is a heap-based buffer overflow vulnerability in IBM AIX 7.2, 7.3, and PowerVM VIOS 4.1. The vulnerability requires local access to the affected system and allows an authenticated attacker to trigger a memory corruption condition that enables arbitrary code execution at the privilege level of the running process. The exact vulnerable component is not specified in the advisory, but heap overflows typically result from improper bounds checking in memory operations. IBM has released security patches through Service Packs and Fix Packs to remediate the issue, and customers are advised to apply updates promptly to supported releases.
Affected products
- IBM AIX 7.2, 7.3
- IBM PowerVM VIOS 4.1
Timeline
- 2026-08-20: disclosed