Privilege Escalation via Unhandled x86 NULL Segments in Xen x86 Emulator

CVE-2016-9386 · MEDIUM Severity

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

The x86 emulator in Xen does not properly treat x86 NULL segments as unusable when accessing memory, which might allow local HVM guest users to gain privileges via vectors involving "unexpected" base/limit values.

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