Executive brief
IBM AIX and PowerVM VIOS are operating systems and virtualization platforms used to run enterprise applications. A local attacker who already has access to a system can exploit an out-of-bounds write vulnerability to gain elevated privileges, potentially allowing them to compromise the entire system or access sensitive data.
Technical details
An out-of-bounds write vulnerability exists in IBM AIX 7.2, 7.3, and IBM PowerVM VIOS 4.1. The vulnerability allows a local attacker to write data beyond the boundaries of an allocated buffer, corrupting memory and potentially enabling arbitrary code execution. The attack requires local access to the system (local attack vector) with standard user privileges. By exploiting this flaw, an attacker can escalate their privileges to gain administrative control. IBM has released security updates in the form of Service Packs (SPs) and Fix Packs (FPs) to address this vulnerability.
Affected products
- IBM AIX 7.2, 7.3
- IBM PowerVM VIOS 4.1
Timeline
- 2026-08-20: disclosed