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CVE-2026-4018

TOCTOU race condition in the QNX Neutrino kernel impacts versions of the QNX Software Development Platform and QNX OS for Safety

MEDIUM
6.4
CVSS Score
Published: July 14, 2026 at 05:34 PM UTC
Updated: July 15, 2026 at 04:44 PM UTC
3 products affected across 1 vendorQNX Software Development PlatformQNX OS for MedicalQNX OS for Safety

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Severity
MEDIUM6.4
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

Description

TOCTOU Race Condition in specific trace commands of the TraceEvent() system call could allow an attacker with local access and with the PROCMGR_AID_TRACE ability, to cause information disclosure, data tampering or a crash of the QNX Neutrino kernel.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Source: cverecord
https://support.blackberry.com/pkb/s/article/141213

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.4MEDIUMblackberry
Attack Vector
LOCAL
Complexity
HIGH
Privileges
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-367

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