OpenBSD Dup2 VFS Race Condition Denial Of Service Vulnerability

OpenBSD is a BSD based operating system maintained and distributed by the OpenBSD project. OpenBSD has been designed as a secure implementation of the BSD Operating System, and offers numerous security features.

A problem with OpenBSD makes it possible for a local user to cause a kernel panic. Due to a design problem which can allow a file descriptor of a process to drop into sleep while another process sharing the same file descriptor table sets the file descriptor to null, it will cause kernel panic.

This problem results in a kernel panic, causing the system to crash and resulting in a denial of service.


 

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