Description

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.

References

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=2febc839133280d5a5e8e1179c94ea674489dae2

http://rhn.redhat.com/errata/RHSA-2015-0126.html

http://rhn.redhat.com/errata/RHSA-2015-0284.html

http://rhn.redhat.com/errata/RHSA-2015-0869.html

http://www.debian.org/security/2014/dsa-3060

http://www.openwall.com/lists/oss-security/2014/10/24/9

http://www.ubuntu.com/usn/USN-2394-1

http://www.ubuntu.com/usn/USN-2417-1

http://www.ubuntu.com/usn/USN-2418-1

http://www.ubuntu.com/usn/USN-2491-1

https://bugzilla.redhat.com/show_bug.cgi?id=1144878

https://github.com/torvalds/linux/commit/2febc839133280d5a5e8e1179c94ea674489dae2

Details

Risk Information

CVSS v2

CVSS v3