CVE-2026-16967: CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition
CVE-2026-16967 is a high-severity vulnerability in IBM i versions 7.3, 7.4, 7.5, and 7.6. It involves a time-of-check to time-of-use (TOCTOU) race condition related to symbolic links that could allow a remote authenticated attacker to gain unauthorized access to system objects.
AI Analysis
Technical Summary
This vulnerability affects IBM i operating system versions 7.3 through 7.6. It is a TOCTOU race condition (CWE-367) involving symbolic links, where the system incorrectly handles the timing between checking access permissions and using the resource. This flaw could be exploited by a remote attacker with authentication to gain unauthorized access to system objects, potentially leading to full confidentiality, integrity, and availability impact as indicated by the CVSS vector.
Potential Impact
Successful exploitation could allow a remote authenticated attacker to bypass access controls and gain unauthorized access to system objects, resulting in complete compromise of confidentiality, integrity, and availability of affected systems.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround has been documented at this time.
CVE-2026-16967: CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition
Description
CVE-2026-16967 is a high-severity vulnerability in IBM i versions 7.3, 7.4, 7.5, and 7.6. It involves a time-of-check to time-of-use (TOCTOU) race condition related to symbolic links that could allow a remote authenticated attacker to gain unauthorized access to system objects.
CVSS v3.1
Score 8.5high
Affected software
cpe:2.3:a:ibm:i:7.6:*:*:*:*:*:*:*cpe:2.3:a:ibm:i:7.6.0:*:*:*:*:*:*:*cpe:2.3:a:ibm:i:7.5:*:*:*:*:*:*:*cpe:2.3:a:ibm:i:7.5.0:*:*:*:*:*:*:*cpe:2.3:a:ibm:i:7.4:*:*:*:*:*:*:*cpe:2.3:a:ibm:i:7.4.0:*:*:*:*:*:*:*Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability affects IBM i operating system versions 7.3 through 7.6. It is a TOCTOU race condition (CWE-367) involving symbolic links, where the system incorrectly handles the timing between checking access permissions and using the resource. This flaw could be exploited by a remote attacker with authentication to gain unauthorized access to system objects, potentially leading to full confidentiality, integrity, and availability impact as indicated by the CVSS vector.
Potential Impact
Successful exploitation could allow a remote authenticated attacker to bypass access controls and gain unauthorized access to system objects, resulting in complete compromise of confidentiality, integrity, and availability of affected systems.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround has been documented at this time.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-07-24T08:22:09.370Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a7e2503bf8831d539bec0de
Added to database: 08/13/2026, 20:11:47 UTC
Last enriched: 08/13/2026, 20:27:15 UTC
Last updated: 08/13/2026, 20:45:18 UTC
Views: 3
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