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CVE-2026-16922: CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition in IBM AIX

0
High
VulnerabilityCVE-2026-16922cvecve-2026-16922cwe-367
Published: 08/20/2026 (08/20/2026, 14:36:08 UTC)
Source: CVE Database V5
Vendor/Project: IBM
Product: AIX

Description

IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a local attacker to execute arbitrary code due to a time-of-check to time-of-use (TOCTOU) race condition.

CVSS v3.1

Score 7.0high

Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
CVSS:3.1/AV:L/AC:H/PR:L/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, 14:52:59 UTC

Technical Analysis

This vulnerability is a TOCTOU race condition (CWE-367) in IBM AIX 7.2, 7.3, and IBM PowerVM VIOS 4.1. It allows a local attacker with low privileges to exploit the timing window between checking a condition and using a resource, potentially leading to arbitrary code execution. The CVSS 3.1 base score is 7.0, reflecting high impact on confidentiality, integrity, and availability. No vendor advisory or patch information is currently available, and no known exploits are reported in the wild.

Potential Impact

Successful exploitation could result in arbitrary code execution by a local attacker with low privileges, potentially compromising system confidentiality, integrity, and availability. The attack complexity is high, and user interaction is not required. This could lead to significant security breaches on affected systems if exploited.

Mitigation Recommendations

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, limit local access to trusted users only and monitor for suspicious activity related to this vulnerability.

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Technical Details

Data Version
5.2
Assigner Short Name
ibm
Date Reserved
2026-07-24T07:05:03.530Z
Cvss Version
3.1
State
PUBLISHED
Remediation Level
null

Threat ID: 6a871151acd9273b49bdeede

Added to database: 08/20/2026, 14:38:09 UTC

Last enriched: 08/20/2026, 14:52:59 UTC

Last updated: 08/20/2026, 21:27:22 UTC

Views: 8

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