CVE-2026-16849: CWE-129 Improper Validation of Array Index in IBM AIX
Description
CVE-2026-16849 is a medium severity vulnerability in IBM AIX versions 7.2 and 7.3, and IBM PowerVM VIOS 4.1. It involves improper validation of an array index boundary, which could allow a remote attacker to cause a denial of service. The vulnerability does not impact confidentiality or integrity but affects availability. No known exploits are reported in the wild. No patch or remediation details are provided in the available data.
CVSS v3.1
Score 4.3medium
Affected software
IBM
AIX
IBM
PowerVM VIOS
cpe:2.3:a:ibm:aix:7.2:*:*:*:*:*:*:*cpe:2.3:a:ibm:aix:7.2.0:*:*:*:*:*:*:*cpe:2.3:a:ibm:aix:7.3:*:*:*:*:*:*:*cpe:2.3:a:ibm:aix:7.3.0:*:*:*:*:*:*:*cpe:2.3:a:ibm:powervm_vios:4.1:*:*:*:*:*:*:*cpe:2.3:a:ibm:powervm_vios:4.1.0:*:*:*:*:*:*:*Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, identified as CWE-129 (Improper Validation of Array Index), affects IBM AIX 7.2, 7.3, and IBM PowerVM VIOS 4.1. It allows a remote attacker to cause a denial of service by exploiting improper checks on array index boundaries. The CVSS v3.1 base score is 4.3, reflecting a medium severity with attack vector as adjacent network, low attack complexity, no privileges required, no user interaction, and impact limited to availability.
Potential Impact
The vulnerability can be exploited remotely without privileges or user interaction to cause a denial of service, impacting system availability. There is no impact on confidentiality or integrity. No known active exploitation has been reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the IBM vendor advisory for current remediation guidance. Until an official fix is available, monitor IBM security advisories for updates. No specific mitigation steps are provided in the current data.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-07-24T03:17:38.730Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a860991acd9273b498b4c27
Added to database: 08/19/2026, 19:52:49 UTC
Last enriched: 09/11/2026, 07:48:53 UTC
Last updated: 10/04/2026, 10:02:25 UTC
Views: 54
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