A grant unmapping issue exists in Xen up to and including 4.9.x. When removing or replacing a grant mapping, the x86 PV specific path needs to make sure page table entries remain in sync with other accounting done. Although the identity of the page frame was validated correctly, neither the presence of the mapping nor page writability were taken into account.
Vulnerable Product | Search on Vulmon | Subscribe to Product |
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xen xen |