Improper Validation of Level 2 Page Table Entries in Xen Allows Privilege Escalation via Crafted Superpage Mapping

CVE-2015-7835 · HIGH Severity

AV:L/AC:L/AU:N/C:C/I:C/A:C

The mod_l2_entry function in arch/x86/mm.c in Xen 3.4 through 4.6.x does not properly validate level 2 page table entries, which allows local PV guest administrators to gain privileges via a crafted superpage mapping.

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