CVE-2026-16943: CWE-787 Out-of-bounds Write in IBM AIX
Description
CVE-2026-16943 is a high-severity vulnerability affecting IBM AIX versions 7.2 and 7.3, as well as IBM PowerVM VIOS 4.1. It involves a heap-based buffer overflow that could allow a local attacker with high privileges to execute arbitrary code. The vulnerability does not require user interaction and impacts confidentiality, integrity, and availability. No patch or remediation details are provided in the available data.
CVSS v3.1
Score 8.2high
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 (CVE-2026-16943) is a heap-based buffer overflow (CWE-787) in IBM AIX 7.2, 7.3, and IBM PowerVM VIOS 4.1. It enables a local attacker with high privileges to execute arbitrary code on the affected systems. The CVSS 3.1 score is 8.2, reflecting high impact on confidentiality, integrity, and availability. The attack vector is local, requiring low attack complexity and no user interaction. The vulnerability is published and assigned by IBM but no official patch or mitigation details are provided in the input data.
Potential Impact
Successful exploitation allows a local attacker with high privileges to execute arbitrary code, potentially leading to full system compromise including confidentiality, integrity, and availability impacts.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround is provided in the available information.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-07-24T07:54:43.632Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a87778eacd9273b492c5fa1
Added to database: 08/20/2026, 21:54:22 UTC
Last enriched: 09/10/2026, 20:47:07 UTC
Last updated: 10/05/2026, 06:48:14 UTC
Views: 41
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