CVE-2026-16866: CWE-125 Out-of-bounds Read in IBM AIX
Description
CVE-2026-16866 is an out-of-bounds read vulnerability (CWE-125) affecting IBM AIX versions 7.2 and 7.3, as well as IBM PowerVM VIOS 4.1. This flaw could allow a remote attacker to cause a denial of service condition. The vulnerability does not impact confidentiality but may affect integrity and availability. The CVSS score is 4.8, indicating a medium severity level.
CVSS v3.1
Score 4.8medium
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 involves an out-of-bounds read in IBM AIX 7.2, 7.3, and IBM PowerVM VIOS 4.1. A remote attacker could exploit this flaw to cause a denial of service. The CVSS v3.1 vector indicates the attack requires network access with high attack complexity and no privileges or user interaction. The impact is limited to integrity and availability with no confidentiality impact. There is no indication of known exploits in the wild or available patches from the provided data.
Potential Impact
The vulnerability allows a remote attacker to cause a denial of service, impacting system availability and potentially integrity. There is no confidentiality impact. No known active exploitation has been reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided in the available data. Monitor IBM's security advisories for updates and apply patches once available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-07-24T04:11:52.991Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a860993acd9273b498b4c61
Added to database: 08/19/2026, 19:52:51 UTC
Last enriched: 09/11/2026, 07:34:34 UTC
Last updated: 10/04/2026, 10:02:25 UTC
Views: 35
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