Description

IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to execute arbitrary code due to improper privilege management.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "9.8",
  "pubDate": "2026-08-20T22:17:13.683Z",
  "pubdate": "2026-08-20T22:17:13.683Z",
  "executiveSummary": "A remote code execution vulnerability exists in IBM AIX and IBM PowerVM VIOS resulting from improper privilege management. This security flaw enables an unauthenticated or privileged remote threat actor to manipulate execution contexts and execute arbitrary code within the underlying operating system environment.\nThe affected products include IBM AIX 7.2, IBM AIX 7.3, and IBM PowerVM VIOS 4.1. Successful exploitation of this vulnerability compromises the confidentiality, integrity, and availability of the host operating system, potentially leading to total system compromise.\nThe risk implications are critical, as remote attackers can leverage this flaw to bypass standard access controls and execute administrative commands. The attack capability requires network access to vulnerable services exposed by the affected platforms, where improper handling of security contexts allows the escalation of operational privileges during processing.",
  "technicalDetails": "The vulnerability stems from improper privilege management within the security and access control subsystems of IBM AIX 7.2, IBM AIX 7.3, and IBM PowerVM VIOS 4.1. The root cause lies in the flawed enforcement of authorization boundaries, where execution contexts fail to properly validate or restrict user privileges during specific request handling procedures.\nExploitation of this flaw occurs when a remote attacker sends specially crafted network payloads designed to interact with vulnerable system daemons or management interfaces. Because the affected component fails to enforce strict privilege separation, the interaction allows the attacker to supply input that is subsequently processed within an elevated execution context.\nThe attack flow proceeds as follows: First, the remote attacker establishes a network connection to the targeted service running on the vulnerable IBM AIX or VIOS instance. Second, the attacker transmits a crafted payload intended to exploit the improper privilege validation logic. Third, the vulnerable subsystem improperly maintains or elevates privileges while processing the request, failing to drop security tokens or enforce access control lists (ACLs). Fourth, this authorization bypass permits the execution of arbitrary system commands or code injection within the memory space of the privileged process.\nPost-exploitation impact includes full system access, privilege escalation to administrative levels, unauthorized data exfiltration, modification of system configurations, and potential lateral movement across connected logical partitions (LPARs) managed by the compromised PowerVM VIOS environment. Authentication and specific privilege prerequisites depend on the exact network exposure of the vulnerable service interface, though the flaw fundamentally enables remote code execution capabilities."
}