arch/x86/kvm/x86.c in the Linux kernel before 2.6.36.2 does not initialize certain structure members, which allows local users to obtain potentially sensitive information from kernel stack memory via read operations on the /dev/kvm device.
https://bugzilla.redhat.com/show_bug.cgi?id=649920
http://www.vupen.com/english/advisories/2011/0298
http://www.vupen.com/english/advisories/2011/0124
http://www.vupen.com/english/advisories/2010/3287
http://www.spinics.net/lists/kvm/msg44130.html
http://www.securityfocus.com/bid/44666
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.36.2
http://securitytracker.com/id?1024912
http://secunia.com/advisories/42932
http://rhn.redhat.com/errata/RHSA-2010-0998.html
http://openwall.com/lists/oss-security/2010/11/05/4
http://openwall.com/lists/oss-security/2010/11/04/10
http://lists.opensuse.org/opensuse-security-announce/2011-02/msg00000.html
http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00004.html
http://git.kernel.org/?p=virt/kvm/kvm.git%3Ba=commit%3Bh=831d9d02f9522e739825a51a11e3bc5aa531a905