Improper Handling of Nested NMI in Linux Kernel x86_64 Platform

CVE-2015-3291 · LOW Severity

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

arch/x86/entry/entry_64.S in the Linux kernel before 4.1.6 on the x86_64 platform does not properly determine when nested NMI processing is occurring, which allows local users to cause a denial of service (skipped NMI) by modifying the rsp register, issuing a syscall instruction, and triggering an NMI.

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