IBM AIX 7.2, 7.3, and IBM PowerVM VIOS 4.1 contain an out-of-bounds write vulnerability (CWE-787) that can be triggered by a local attacker. This vulnerability can cause a denial of service by corrupting memory outside the intended buffer boundaries. The CVSS 3.1 base score is 6.5, reflecting medium severity with local attack vector, low attack complexity, low privileges required, no user interaction, and impact limited to availability. No vendor advisory or patch information is currently available.

Successful exploitation results in denial of service due to out-of-bounds memory write. There is no impact on confidentiality or integrity. The attacker must have local access with low privileges. No known exploits are reported in the wild at this time.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict local access to trusted users only to reduce risk.