# CVE-2026-40274: QNX Neutrino invalid pointer reference in TimerSettime

Source: https://junglewise.ai/threats/cve-2026-40274-invalid-pointer-reference-in-the-timersettime-system-call-could  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-10. Updated: 2026-11-10  
License: CC BY 4.0 with a link back

CVE-2026-40274 · Severity: medium · CVSS 4 · Published 2026-11-10

QNX Neutrino is a real-time operating system used in embedded systems and IoT devices. An attacker with local access to a system can craft a malicious timer event through the TimerSettime system call, exploiting an invalid pointer reference that leads to information disclosure, potentially exposing sensitive kernel memory.

Vendors: [QNX](https://junglewise.ai/threats/vendors/qnx).

## Quick answers

**Is CVE-2026-40274 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-40274 being exploited in the wild.

**How severe is CVE-2026-40274?** Medium severity, with a CVSS score of 4, published 10 November 2026.

**Which products and versions are affected?** QNX Neutrino.

**Is there a fix for CVE-2026-40274?** 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-2026-40274 attacked?** It is attacked with local access, in an operating system.

**Am I affected by CVE-2026-40274?** Check whether you run QNX Neutrino. 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

The TimerSettime() system call in QNX Neutrino kernel contains an invalid pointer dereference vulnerability. A local attacker can craft a malicious timer event to trigger the invalid pointer reference, resulting in disclosure of kernel memory contents. This requires local system access and user interaction to arm the crafted timer.

## Affected products

- QNX Neutrino

## Timeline

- 2026-11-10: disclosed

## References

- [https://support.blackberry.com/pkb/s/article/141342](https://support.blackberry.com/pkb/s/article/141342)

## Related threats

- [QNX Neutrino heap-based buffer overflow in DCMD_PROC_EVENT handler](https://junglewise.ai/threats/cve-2026-40275-heap-based-buffer-overflow-in-the-dcmd-proc-event-handler-of-the)