CVE-2026-17157: CWE-787 Out-of-bounds Write in IBM AIX
Description
CVE-2026-17157 is a critical vulnerability in IBM AIX versions 7.2 and 7.3, and IBM PowerVM VIOS 4.1. It involves a stack buffer overflow that could allow a remote attacker to execute arbitrary code without requiring user interaction or privileges. The vulnerability has a high CVSS score of 9.8, indicating severe impact on confidentiality, integrity, and availability.
CVSS v3.1
Score 9.8critical
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-2026-17157) is a stack-based buffer overflow (CWE-787) affecting 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 on the stack, enabling potential full system compromise. The CVSS v3.1 base score is 9.8, reflecting network attack vector, low attack complexity, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation could lead to remote code execution with full system privileges, compromising system confidentiality, integrity, and availability. This could allow attackers to take complete control of affected systems remotely.
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's official security advisories for updates and apply patches promptly once available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-07-24T17:45:41.673Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a877ac3acd9273b493025a4
Added to database: 08/20/2026, 22:08:03 UTC
Last enriched: 09/10/2026, 20:17:24 UTC
Last updated: 10/05/2026, 06:48:14 UTC
Views: 51
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