CVE-2026-16886: CWE-787 Out-of-bounds Write in IBM AIX
Description
CVE-2026-16886 is a medium severity vulnerability in IBM AIX versions 7.2 and 7.3, and IBM PowerVM VIOS 4.1. It involves an out-of-bounds write that could be triggered remotely, potentially causing 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 (CVE-2026-16886) affects IBM AIX 7.2, 7.3, and IBM PowerVM VIOS 4.1. It is classified as a CWE-787 out-of-bounds write issue that could allow a remote attacker to cause a denial of service condition. The CVSS 3.1 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 loss.
Potential Impact
An attacker with network access adjacent to the vulnerable system could exploit this out-of-bounds write to cause a denial of service, disrupting system availability. There is no impact on confidentiality or integrity according to the CVSS vector. 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 workaround information is provided in the available data.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-07-24T04:59:49.677Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a860d18acd9273b498f9c22
Added to database: 08/19/2026, 20:07:52 UTC
Last enriched: 09/11/2026, 07:34:18 UTC
Last updated: 10/04/2026, 10:02:25 UTC
Views: 36
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