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CVE-2014-3690

Published: 10 November 2014

arch/x86/kvm/vmx.c in the KVM subsystem in the Linux kernel before 3.17.2 on Intel processors does not ensure that the value in the CR4 control register remains the same after a VM entry, which allows host OS users to kill arbitrary processes or cause a denial of service (system disruption) by leveraging /dev/kvm access, as demonstrated by PR_SET_TSC prctl calls within a modified copy of QEMU.

From the Ubuntu security team

A flaw was discovered in how the Linux kernel's KVM (Kernel Virtual Machine) subsystem handles the CR4 control register at VM entry on Intel processors. A local host OS user can exploit this to cause a denial of service (kill arbitrary processes, or system disruption) by leveraging /dev/kvm access.

Priority

Medium

CVSS 3 base score: 5.5

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
Patches:
Introduced by 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Fixed by d974baa398f34393db76be45f7d4d04fbdbb4a0a
linux-armadaxp
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
This package is not directly supported by the Ubuntu Security Team
linux-aws
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-ec2
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-flo
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-fsl-imx51
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-gke
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-goldfish
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-grouper
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-hwe
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-hwe-edge
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-linaro-omap
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-linaro-shared
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-linaro-vexpress
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-lts-quantal
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
This package is not directly supported by the Ubuntu Security Team
linux-lts-raring
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-lts-saucy
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
This package is not directly supported by the Ubuntu Security Team
linux-lts-trusty
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-lts-utopic
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-lts-vivid
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-lts-wily
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-lts-xenial
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-maguro
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-mako
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-manta
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-mvl-dove
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-qcm-msm
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-raspi2
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-snapdragon
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-ti-omap4
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)

Notes

AuthorNote
jdstrand
android kernels (flo, goldfish, grouper, maguro, mako and manta) are
not supported on the Ubuntu Touch 14.04 preview kernels
linux-lts-saucy no longer receives official support
linux-lts-quantal no longer receives official support

References

Bugs