CVE-2026-4018: CWE-367 Time-of-check time-of-use (TOCTOU) race condition in BlackBerry Ltd QNX Software Development Platform
CVE-2026-4018 is a time-of-check time-of-use (TOCTOU) race condition vulnerability in specific trace commands of the TraceEvent() system call in BlackBerry Ltd's QNX Software Development Platform. An attacker with local access and the PROCMGR_AID_TRACE ability could exploit this to cause information disclosure, data tampering, or a kernel crash. The vulnerability affects versions 7.0 and 7.1 of the platform. The CVSS 3.1 base score is 6.4, indicating a medium severity level. No official patch or remediation guidance has been published yet.
AI Analysis
Technical Summary
This vulnerability involves a TOCTOU race condition in certain trace commands within the TraceEvent() system call of the QNX Neutrino kernel. Exploitation requires local access and elevated privileges (PROCMGR_AID_TRACE). Successful exploitation could lead to information disclosure, integrity violations through data tampering, or denial of service via kernel crash. The affected versions are exactly 7.0 and 7.1 of the QNX Software Development Platform. There is no vendor advisory or patch currently available, and no known exploits in the wild have been reported.
Potential Impact
An attacker with local access and the PROCMGR_AID_TRACE privilege can exploit the race condition to disclose sensitive information, tamper with data, or cause a kernel crash, impacting confidentiality, integrity, and availability of the affected system.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict local access and the assignment of the PROCMGR_AID_TRACE ability to trusted users only to reduce risk.
CVE-2026-4018: CWE-367 Time-of-check time-of-use (TOCTOU) race condition in BlackBerry Ltd QNX Software Development Platform
Description
CVE-2026-4018 is a time-of-check time-of-use (TOCTOU) race condition vulnerability in specific trace commands of the TraceEvent() system call in BlackBerry Ltd's QNX Software Development Platform. An attacker with local access and the PROCMGR_AID_TRACE ability could exploit this to cause information disclosure, data tampering, or a kernel crash. The vulnerability affects versions 7.0 and 7.1 of the platform. The CVSS 3.1 base score is 6.4, indicating a medium severity level. No official patch or remediation guidance has been published yet.
CVSS v3.1
Score 6.4medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a TOCTOU race condition in certain trace commands within the TraceEvent() system call of the QNX Neutrino kernel. Exploitation requires local access and elevated privileges (PROCMGR_AID_TRACE). Successful exploitation could lead to information disclosure, integrity violations through data tampering, or denial of service via kernel crash. The affected versions are exactly 7.0 and 7.1 of the QNX Software Development Platform. There is no vendor advisory or patch currently available, and no known exploits in the wild have been reported.
Potential Impact
An attacker with local access and the PROCMGR_AID_TRACE privilege can exploit the race condition to disclose sensitive information, tamper with data, or cause a kernel crash, impacting confidentiality, integrity, and availability of the affected system.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict local access and the assignment of the PROCMGR_AID_TRACE ability to trusted users only to reduce risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- blackberry
- Date Reserved
- 2026-03-11T19:24:46.531Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a56768c68715ace43f08bcd
Added to database: 07/14/2026, 17:49:00 UTC
Last enriched: 07/15/2026, 00:48:31 UTC
Last updated: 07/15/2026, 00:48:31 UTC
Views: 2
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