CVE-2026-4017 Memory corruption in QNX OS for Medical
A local attacker can exploit a buffer overflow in the QNX kernel to disclose information, tamper with data, or crash the system.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-4017?
CVE-2026-4017 is a high-severity memory corruption 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
Buffer Overflow in the entry handler of the TraceEvent() system call could allow an attacker with local access to cause information disclosure, data tampering or a crash of the QNX Neutrino kernel.
Weakness: CWE-121
Which versions are affected by CVE-2026-4017?
How do I fix CVE-2026-4017?
No fix has been published for CVE-2026-4017 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-4017 being exploited?
There is no known exploitation of CVE-2026-4017 in the wild and no public exploit code.
Sources
Also known as GHSA-8422-84vm-vcr2.