Skip to content



pkey_free - frees an arch-specific key assigned to a memory address


pkey_free is a syscall which removes the architecture-specific protection key assigned to a memory address. The memory address associated with the protection key is then available to be accessed without any restrictions, and the protection key is freed from the table managed by the kernel.

This syscall is necessary when dealing with memory regions where access needs to be restricted for particular users or tasks. This can be done by assigning an array of protection keys to a memory address. Access to this memory will then be restricted to those users and tasks that have been assigned the protection key.


  • pkey:int[K] - key to be freed.

Available Tags

  • K - Originated from kernel-space.






To monitor the freeing of protection keys by users or processes, as well as to detect any potential misuse.

Example Use Case

pkey_free can be used to enforce memory protection policies. For example, it can be used to restrict access to certain sensitive memory regions to a select group of users or tasks.


No known issues.

  • pkey_alloc

This document was automatically generated by OpenAI and needs review. It might not be accurate and might contain errors. The authors of Tracee recommend that the user reads the "events.go" source file to understand the events and their arguments better.