Improper Handling of Nested NMIs in Linux Kernel x86_64 Platform

CVE-2015-3290 · HIGH Severity

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

arch/x86/entry/entry_64.S in the Linux kernel before 4.1.6 on the x86_64 platform improperly relies on espfix64 during nested NMI processing, which allows local users to gain privileges by triggering an NMI within a certain instruction window.

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