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CVE-2026-17157: CWE-787 Out-of-bounds Write in IBM AIX

0
Critical
VulnerabilityCVE-2026-17157cvecve-2026-17157cwe-787
Published: 08/20/2026 (08/20/2026, 21:55:09 UTC)
Source: CVE Database V5
Vendor/Project: IBM
Product: AIX

Description

CVE-2026-17157 is a critical vulnerability in IBM AIX versions 7.2 and 7.3 and IBM PowerVM VIOS 4.1 that allows a remote attacker to execute arbitrary code via a stack buffer overflow. The vulnerability is classified as CWE-787 (Out-of-bounds Write). It has a CVSS 3.1 base score of 9.8, indicating high impact on confidentiality, integrity, and availability. No official patch or remediation information is currently provided by the vendor. There are no known exploits in the wild at this time.

CVSS v3.1

Score 9.8critical

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected software

ibm/aix
pkg:rpm/ibm/aix
Affected versions
=7.2=7.3
ibm/powervm_vios
pkg:rpm/ibm/powervm_vios
Affected versions
=4.1
CPE configurations (6)
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:*:*:*:*:*:*:*

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AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 08/20/2026, 22:24:09 UTC

Technical Analysis

This vulnerability involves a stack buffer overflow in IBM AIX 7.2, 7.3, and IBM PowerVM VIOS 4.1, which could allow a remote attacker to execute arbitrary code. The flaw is categorized under CWE-787 (Out-of-bounds Write). The CVSS 3.1 score of 9.8 reflects that the attack vector is network-based, requires no privileges or user interaction, and can fully compromise confidentiality, integrity, and availability of the affected systems. The vulnerability is publicly disclosed but lacks an official remediation or patch at this time.

Potential Impact

Successful exploitation of this vulnerability could allow remote attackers to execute arbitrary code on affected IBM AIX and PowerVM VIOS systems, potentially leading to full system compromise. The critical CVSS score indicates severe impact on confidentiality, integrity, and availability. No known exploits are currently reported in the wild.

Mitigation Recommendations

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or temporary mitigation is provided, organizations should monitor IBM's advisories closely and apply any updates once available. Until then, consider limiting network exposure of affected systems if feasible.

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Technical Details

Data Version
5.2
Assigner Short Name
ibm
Date Reserved
2026-07-24T17:45:41.673Z
Cvss Version
3.1
State
PUBLISHED
Remediation Level
null

Threat ID: 6a877ac3acd9273b493025a4

Added to database: 08/20/2026, 22:08:03 UTC

Last enriched: 08/20/2026, 22:24:09 UTC

Last updated: 08/20/2026, 23:19:39 UTC

Views: 3

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