CVE-2026-16819: CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition in IBM AIX
CVE-2026-16819 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 time-of-check to time-of-use (TOCTOU) race condition that could allow a local attacker to cause denial of service and compromise data integrity.
AI Analysis
Technical Summary
This vulnerability is a TOCTOU race condition (CWE-367) present in IBM AIX 7.2, 7.3 and IBM PowerVM VIOS 4.1. A local attacker could exploit this flaw to cause denial of service and compromise data integrity by exploiting the timing window between checking a condition and using the result of that check.
Potential Impact
The vulnerability allows a local attacker to cause denial of service and compromise data integrity on affected systems. There is no indication of confidentiality impact. The CVSS v3.1 score is 7.7 (high), reflecting local attack vector, low attack complexity, no privileges required, no user interaction, unchanged scope, no confidentiality impact, high integrity impact, and high availability impact.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No vendor advisory or patch links are provided in the input data. Until an official fix is available, monitor IBM advisories for updates.
CVE-2026-16819: CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition in IBM AIX
Description
CVE-2026-16819 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 time-of-check to time-of-use (TOCTOU) race condition that could allow a local attacker to cause denial of service and compromise data integrity.
CVSS v3.1
Score 7.7high
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 is a TOCTOU race condition (CWE-367) present in IBM AIX 7.2, 7.3 and IBM PowerVM VIOS 4.1. A local attacker could exploit this flaw to cause denial of service and compromise data integrity by exploiting the timing window between checking a condition and using the result of that check.
Potential Impact
The vulnerability allows a local attacker to cause denial of service and compromise data integrity on affected systems. There is no indication of confidentiality impact. The CVSS v3.1 score is 7.7 (high), reflecting local attack vector, low attack complexity, no privileges required, no user interaction, unchanged scope, no confidentiality impact, high integrity impact, and high availability impact.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No vendor advisory or patch links are provided in the input data. Until an official fix is available, monitor IBM advisories for updates.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-07-24T01:49:39.683Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a85ca6dacd9273b493ff5a3
Added to database: 08/19/2026, 15:23:25 UTC
Last enriched: 09/11/2026, 08:02:27 UTC
Last updated: 10/02/2026, 09:15:53 UTC
Views: 63
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