Executive brief
IBM AIX and PowerVM VIOS are operating systems used to run critical enterprise applications and virtualized workloads in data centers. A heap-based buffer overflow flaw allows a local user to execute arbitrary code with elevated system privileges, potentially compromising the entire system and any workloads running on it.
Technical details
The vulnerability is a heap-based buffer overflow in IBM AIX 7.2, 7.3, and PowerVM VIOS 4.1 that permits local privilege escalation. The attack requires local access to the affected system; a local attacker can overflow a heap buffer to corrupt memory and execute arbitrary code with elevated privileges. The specific vulnerable component and root cause are not detailed in the advisory. IBM has delivered fixes via Service Packs (SPs) and Fix Packs (FPs) incorporated into cumulative maintenance packages.
Affected products
- IBM AIX 7.2, 7.3
- IBM PowerVM VIOS 4.1
Timeline
- 2026-08-20: disclosed