CVE-2026-4018: Blackberry Ltd Qnx OS For Medical

Medium severity, CVSS 6.4. EPSS: 0.1% chance of exploitation in the next 30 days.

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.

Affected products

• Blackberry Ltd Qnx OS For Medical: up to and including 2.0.2
• Blackberry Ltd Qnx OS For Safety: up to and including 2.2.8; up to and including 2.1.5; up to and including 2.0.3
• Blackberry Ltd Qnx Software Development Platform: version 7.1 only; version 7.0 only

Published 2026-07-14. Last modified 2026-07-15.