CVE-2026-4018 Race condition in QNX OS for Medical
A local attacker with trace privileges can exploit a race condition in the QNX kernel to disclose information, tamper with data, or crash the system.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-4018?
CVE-2026-4018 is a medium-severity vulnerability in BlackBerry Ltd QNX OS for Medical, published on 14 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-367
Which versions are affected by CVE-2026-4018?
How do I fix CVE-2026-4018?
No fix has been published for CVE-2026-4018 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-4018 being exploited?
There is no known exploitation of CVE-2026-4018 in the wild and no public exploit code.
Sources
Also known as GHSA-vm3p-4vxh-gffg.