CVE-2016-4020 (debian_linux, enterprise_linux_desktop, enterprise_linux_eus, enterprise_linux_server, enterprise_linux_server_aus, enterprise_linux_server_tus, enterprise_linux_workstation, openstack, qemu, ubuntu_linux, virtualization)

The patch_instruction function in hw/i386/kvmvapic.c in QEMU does not initialize the imm32 variable, which allows local guest OS administrators to obtain sensitive information from host stack memory by accessing the Task Priority Register (TPR).

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