CVE-2026-17436: CWE-787 Out-of-bounds Write in IBM AIX
Description
CVE-2026-17436 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 remote attacker to execute arbitrary code without requiring user interaction or privileges. The vulnerability has a CVSS 3.1 base score of 8.8, indicating a significant risk to confidentiality, integrity, and availability.
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 (CVE-2026-17436) is a heap-based buffer overflow in IBM AIX 7.2, 7.3, and IBM PowerVM VIOS 4.1. It allows remote attackers to execute arbitrary code due to improper bounds checking leading to out-of-bounds writes. The CVSS 3.1 vector indicates the attack can be performed remotely with low complexity, no privileges, and no user interaction, impacting confidentiality, integrity, and availability at a high level.
Potential Impact
Successful exploitation could result in complete compromise of the affected systems, including arbitrary code execution with the privileges of the vulnerable service. This impacts confidentiality, integrity, and availability severely. There are no known exploits in the wild at the time of publication.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official patch or workaround information is provided in the available data. Users should monitor IBM security advisories for updates and apply patches as soon as they become available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-07-25T15:21:35.426Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a877ac7acd9273b493025e7
Added to database: 08/20/2026, 22:08:07 UTC
Last enriched: 09/10/2026, 20:01:59 UTC
Last updated: 10/05/2026, 06:48:14 UTC
Views: 41
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