Executive brief
IBM AIX and PowerVM VIOS are enterprise operating systems used to run critical business applications. A remote attacker could exploit an out-of-bounds memory write vulnerability to gain unauthorized access to sensitive data and modify system files without authentication, potentially compromising the confidentiality and integrity of hosted applications and data.
Technical details
The vulnerability is an out-of-bounds write flaw in IBM AIX 7.2, 7.3, and PowerVM VIOS 4.1 that can be exploited remotely without authentication. The out-of-bounds write allows an attacker to write data beyond allocated memory boundaries, potentially corrupting critical data structures, overwriting sensitive information, or achieving code execution. Attack vectors and specific vulnerable components are not detailed in the advisory, but the vulnerability allows compromise of both confidentiality and integrity. Patches are available through IBM security updates; customers should apply Service Packs and Fix Packs from IBM.
Affected products
- IBM AIX 7.2, 7.3
- IBM PowerVM VIOS 4.1
Timeline
- 2026-08-20: disclosed