Is CVE-2026-4017 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-4017 being exploited in the wild.

How severe is CVE-2026-4017?

High severity, with a CVSS score of 7.4, published 14 July 2026.

Which products and versions are affected?

Blackberry QNX OS for Medical 2.0.2 and earlier; Blackberry QNX OS for Safety 2.0.3 and earlier, 2.1.5 and earlier, 2.2.8 and earlier; Blackberry QNX Software Development Platform 7.0, 7.1.

Is there a fix for CVE-2026-4017?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-4017 attacked?

It is attacked with local access, in an operating system.

Am I affected by CVE-2026-4017?

Check whether you run Blackberry QNX OS for Medical, Blackberry QNX OS for Safety or Blackberry QNX Software Development Platform at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-4017: BlackBerry QNX Neutrino kernel buffer overflow in TraceEvent system call

CVE-2026-4017 · Severity: high · CVSS 7.4 · Published 2026-07-14

A vulnerability has been identified in the QNX Neutrino kernel, a real-time operating system used in critical automotive, medical, and industrial systems. An attacker with local access to a device could exploit this flaw to crash the system, tamper with sensitive data, or access restricted information. This could lead to service disruptions or unauthorized control over safety-critical equipment.

Technologies: Blackberry QNX OS for Medical, Blackberry QNX OS for Safety, Blackberry QNX Software Development Platform. Vendors: Blackberry.

Quick answers

Is CVE-2026-4017 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-4017 being exploited in the wild.
How severe is CVE-2026-4017?: High severity, with a CVSS score of 7.4, published 14 July 2026.
Which products and versions are affected?: Blackberry QNX OS for Medical 2.0.2 and earlier; Blackberry QNX OS for Safety 2.0.3 and earlier, 2.1.5 and earlier, 2.2.8 and earlier; Blackberry QNX Software Development Platform 7.0, 7.1.
Is there a fix for CVE-2026-4017?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-4017 attacked?: It is attacked with local access, in an operating system.
Am I affected by CVE-2026-4017?: Check whether you run Blackberry QNX OS for Medical, Blackberry QNX OS for Safety or Blackberry QNX Software Development Platform at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A stack-based buffer overflow (CWE-121) exists in the entry handler of the TraceEvent() system call within the QNX Neutrino kernel. The vulnerability is triggered when the kernel improperly handles input during system call processing. An attacker with local access can exploit this to overwrite kernel memory, potentially leading to arbitrary code execution in kernel mode, data corruption, or a Denial of Service (kernel panic). While the attack requires local access, the CVSS assessment indicates high complexity (AC:H) but no specific privileges are required (PR:N). Affected products include QNX Software Development Platform (SDP) 7.0/7.1 and specialized QNX OS variants for Safety and Medical applications.

Affected products

BlackBerry Ltd QNX Software Development Platform 7.0, 7.1
BlackBerry Ltd QNX OS for Safety 2.0.3 and earlier, 2.1.5 and earlier, 2.2.8 and earlier
BlackBerry Ltd. QNX OS for Medical 2.0.2 and earlier

Timeline

2026-07-14: advisory: Initial advisory published by BlackBerry and NVD

References

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

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