CVE-2026-16911: CWE-121 Stack-based Buffer Overflow in IBM AIX
CVE-2026-16911 is a high-severity stack-based buffer overflow vulnerability affecting IBM AIX versions 7.2 and 7.3, as well as IBM PowerVM VIOS 4.1. This flaw allows a remote authenticated attacker to execute arbitrary code on the affected systems without user interaction.
AI Analysis
Technical Summary
This vulnerability is a stack-based buffer overflow (CWE-121) present in IBM AIX 7.2, 7.3, and IBM PowerVM VIOS 4.1. It enables a remote attacker with authentication privileges to execute arbitrary code due to improper handling of buffer boundaries on the stack. The CVSS v3.1 base score is 8.8, reflecting high impact on confidentiality, integrity, and availability. No public exploits are currently known, and no vendor patch or advisory details are provided in the input data.
Potential Impact
Successful exploitation could lead to full compromise of affected systems, including arbitrary code execution with the privileges of the authenticated user. This impacts confidentiality, integrity, and availability of the system. The vulnerability requires remote authentication but no user interaction.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict remote access to affected systems to trusted users only and monitor for suspicious activity from authenticated sessions.
CVE-2026-16911: CWE-121 Stack-based Buffer Overflow in IBM AIX
Description
CVE-2026-16911 is a high-severity stack-based buffer overflow vulnerability affecting IBM AIX versions 7.2 and 7.3, as well as IBM PowerVM VIOS 4.1. This flaw allows a remote authenticated attacker to execute arbitrary code on the affected systems without user interaction.
CVSS v3.1
Score 8.8high
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 is a stack-based buffer overflow (CWE-121) present in IBM AIX 7.2, 7.3, and IBM PowerVM VIOS 4.1. It enables a remote attacker with authentication privileges to execute arbitrary code due to improper handling of buffer boundaries on the stack. The CVSS v3.1 base score is 8.8, reflecting high impact on confidentiality, integrity, and availability. No public exploits are currently known, and no vendor patch or advisory details are provided in the input data.
Potential Impact
Successful exploitation could lead to full compromise of affected systems, including arbitrary code execution with the privileges of the authenticated user. This impacts confidentiality, integrity, and availability of the system. The vulnerability requires remote authentication but no user interaction.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict remote access to affected systems to trusted users only and monitor for suspicious activity from authenticated sessions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-07-24T06:26:36.013Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a860d18acd9273b498f9c33
Added to database: 08/19/2026, 20:07:52 UTC
Last enriched: 09/11/2026, 05:31:48 UTC
Last updated: 10/02/2026, 14:46:05 UTC
Views: 49
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