CVE-2012-2121 Information

Description

The KVM implementation in the Linux kernel before 3.3.4 does not properly manage the relationships between memory slots and the iommu which allows guest OS users to cause a denial of service (memory leak and host OS crash) by leveraging administrative access to the guest OS to conduct hotunplug and hotplug operations on devices.

Reference

http://rhn.redhat.com/errata/RHSA-2012-0676.html http://rhn.redhat.com/errata/RHSA-2012-0743.html http://secunia.com/advisories/50732 http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.3.4 http://www.openwall.com/lists/oss-security/2012/04/19/16 http://www.securitytracker.com/id?1027083 http://www.ubuntu.com/usn/USN-1577-1 http://www.ubuntu.com/usn/USN-2036-1 http://www.ubuntu.com/usn/USN-2037-1 https://bugzilla.redhat.com/show_bug.cgi?id=814149 https://github.com/torvalds/linux/commit/09ca8e1173bcb12e2a449698c9ae3b86a8a10195