CVE-2023-46835 x86/AMD: mismatch in IOMMU quarantine page table levels

The current setup of the quarantine page tables assumes that the quarantine domain domio has been initialized with an address width of DEFAULTDOMAINADDRESSWIDTH 48 and hence 4 page table levels. However domio being a PV domain gets the AMD-Vi IOMMU page tables levels based on the maximum hot...

Information Leak

Xen Citrix Hypervisor is vulnerable to Information Leak. The vulnerability is caused due to a quarantine page table level mismatch of the quarantine domain domio where last page table directory PDE effectively becoming a page table entry PTE causing a device in quarantine mode gaining write acces...