CVE-2023-54043

A linked list corruption flaw was found in the Linux kernel's iommufd subsystem. During HWPT (Hardware Page Table) specific attachment, the same hwpt can be added to the ioas->hwpt_list twice due to leftover code from a previous rework. This duplicate insertion corrupts the linked list structure, potentially causing crashes or undefined behavior.

This flaw affects systems using iommufd for IOMMU management, typically in virtualization environments with device passthrough. The list corruption occurs during specific HWPT attachment scenarios and requires the ability to interact with the iommufd interface, which typically needs elevated privileges.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.