CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's iommufd component, where improper handling of internal accesses during the unmap process can lead to object reference leaks. This flaw allows for potential resource mismanagement, which could be exploited in certain scenarios. Organizations using Linux systems, particularly those leveraging IOMMU functionality, should prioritize addressing this issue to mitigate any risks associated with resource leaks.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: iommufd: Avoid locking internal accesses during unmap iommufd_access_notify_unmap() skips internal accesses because they do not have an external unmap callback to invoke. However, the current test calls iommufd_lock_obj() before checking whether the access is internal. If iommufd_lock_obj() succeeds, the loop then sees the internal access and continues, bypassing the matching iommufd_put_object() used by the normal unmap path. This leaks the object reference taken by iommufd_lock_obj(). Check for internal accesses first so skipped entries are never locked.