CVE-2023-46839

Name of the Vulnerable Software and Affected Versions Xen (affected versions not specified)

Description The issue is related to the functionality of phantom functions in PCI devices, which can generate requests using the IDs of unpopulated functions, allowing a device to extend the number of outstanding requests. However, failure to set up the IOMMU context for these phantom functions is not fatal when the device is assigned, leading to potential security issues. This can result in the primary device being assigned to a guest, while some phantom functions are assigned to a different domain. The vulnerability is related to insufficient access control due to incorrect input validation when generating requests.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.