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CVE-2014-3611

Published: 23 October 2014

Race condition in the __kvm_migrate_pit_timer function in arch/x86/kvm/i8254.c in the KVM subsystem in the Linux kernel through 3.17.2 allows guest OS users to cause a denial of service (host OS crash) by leveraging incorrect PIT emulation. A local guest user with access to the PIT i/o ports could use this flaw to crash the host.

From the Ubuntu security team

Lars Bull reported a race condition in the PIT (programmable interrupt timer) emulation in the KVM (Kernel Virtual Machine) subsystem of the Linux kernel. A local guest user with access to PIT i/o ports could exploit this flaw to cause a denial of service (crash) on the host.

Priority

High

CVSS 3 base score: 4.7

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc2)
Patches:
Introduced by 6aa8b732ca01c3d7a54e93f4d701b8aabbe60fb7
Fixed by 2febc839133280d5a5e8e1179c94ea674489dae2
linux-armadaxp
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc2)
This package is not directly supported by the Ubuntu Security Team
linux-aws
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc2)
linux-ec2
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc2)
linux-flo
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc2)
linux-fsl-imx51
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc2)
linux-gke
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc2)
linux-goldfish
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc2)
linux-grouper
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc2)
linux-hwe
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc2)
linux-hwe-edge
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc2)
linux-linaro-omap
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc2)
linux-linaro-shared
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc2)
linux-linaro-vexpress
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc2)
linux-lts-quantal
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc2)
This package is not directly supported by the Ubuntu Security Team
linux-lts-raring
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc2)
linux-lts-saucy
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc2)
This package is not directly supported by the Ubuntu Security Team
linux-lts-trusty
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc2)
linux-lts-utopic
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc2)
linux-lts-vivid
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc2)
linux-lts-wily
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc2)
linux-lts-xenial
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc2)
linux-maguro
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc2)
linux-mako
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc2)
linux-manta
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc2)
linux-mvl-dove
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc2)
linux-qcm-msm
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc2)
linux-raspi2
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc2)
linux-snapdragon
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc2)
linux-ti-omap4
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc2)

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
CVE disclosure was part of miscoordinated CRD (various (incomplete)
commits were publicly leaked by other vendors and upstream before the embargo
was lifted).
Updates for linux on Ubuntu 14.04 LTS were made available to users
on 2014/10/28 but due to a process error, USN publication did not happen
until 2014/10/30.
Updates for linux-lts-trusty on Ubuntu 12.04 LTS were made available
to users on 2014/10/29 but due to a process error, USN publication did not
happen until 2014/10/30.
Updates for linux on Ubuntu 14.10 were made available to users on
2014/10/28 but due to a process error, USN publication did not happen until
2014/10/31.

References

Bugs