Denial Of Service (DoS)

xen is vulnerable to Denial Of Service (DoS). The vulnerability exists due to incorrect caching invalidation guidelines in the AMD-Vi specification (48882—Rev 3.07-PUB—Oct 2022) on certain hardware. Updating specific fields of the DTE without flushing the IOMMU TLB can lead to device malfunctions (e.g., stale DMA mappings). These stale mappings may point to memory ranges not owned by the guest, potentially allowing unauthorized access to unintended memory regions and resulting in an application crash.