CVE-2026-5590: Zephyr RTOS Kernel Race Condition Crash
Platform
linux
Component
zephyr
CVE-2026-5590 describes a race condition vulnerability discovered in the Zephyr RTOS Kernel. This flaw occurs during the TCP connection teardown process, potentially allowing a NULL pointer dereference and subsequent system crash. The vulnerability affects Zephyr RTOS Kernel versions ranging from 0.0.0 to 4.3, and developers are advised to review their code and implement mitigation strategies.
How to fix
Aplique la última actualización de seguridad proporcionada por el proyecto Zephyr RTOS. Esta actualización aborda la condición de carrera que puede provocar una denegación de servicio debido a un acceso a memoria nula. Consulte las notas de la versión y las instrucciones de actualización en el repositorio de Zephyr para obtener detalles específicos.
Frequently asked questions
What is CVE-2026-5590?
CVE-2026-5590 is a Race Condition vulnerability in the Zephyr RTOS Kernel's TCP connection teardown process. A flaw in how the kernel handles SYN packets during teardown can lead to a NULL pointer dereference and a system crash.
Am I affected by CVE-2026-5590?
You are potentially affected if you are using Zephyr RTOS Kernel versions between 0.0.0 and 4.3 (inclusive). Assess your project's dependencies and versions to determine if you are vulnerable.
How can I fix or mitigate CVE-2026-5590?
Currently, no official patch is available. Mitigation strategies include careful code review of the TCP connection teardown logic and potentially disabling unnecessary TCP features to reduce the attack surface.
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