Quick answers
- Is CVE-2026-40273 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-40273 being exploited in the wild.
- How severe is CVE-2026-40273?
- Medium severity, with a CVSS score of 4, published 10 November 2026.
- Which products and versions are affected?
- QNX Neutrino kernel.
- Is there a fix for CVE-2026-40273?
- 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-2026-40273 attacked?
- It is attacked with local access, in an operating system.
- Am I affected by CVE-2026-40273?
- Check whether you run QNX Neutrino kernel. 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 vulnerability exists in improper input validation within the procnto message handler in the QNX Neutrino kernel. An attacker with local access can construct a malicious message that bypasses validation checks, leading to information disclosure from kernel memory. The vulnerability requires local access and does not require authentication or user interaction.
Affected products
- QNX Neutrino kernel
Timeline
- 2026-11-10: disclosed