NULL Pointer Dereference Affecting zephyrproject-rtos/zephyr package, versions [,4.4.0-rc1)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applicationsSnyk Learn
Learn about NULL Pointer Dereference vulnerabilities in an interactive lesson.
Start learning- Snyk IDSNYK-UNMANAGED-ZEPHYRPROJECTRTOSZEPHYR-15992735
- published12 Apr 2026
- disclosed5 Apr 2026
- creditUnknown
Introduced: 5 Apr 2026
CVE-2026-5590 (opens in a new tab)How to fix?
Upgrade zephyrproject-rtos/zephyr to version 4.4.0-rc1 or higher.
Overview
Affected versions of this package are vulnerable to NULL Pointer Dereference in the tcp_recv process. An attacker can cause a system crash and potentially impact confidentiality and integrity by exploiting a race condition during TCP connection teardown, where a NULL pointer is dereferenced due to stale context data when processing a SYN packet.