Race condition in the __exit_signal function in kernel/exit.c in the Linux kernel before 2.6.37-rc2 allows local users to cause a denial of service via vectors related to multithreaded exec, the use of a thread group leader in kernel/posix-cpu-timers.c, and the selection of a new thread group leader in the de_thread function in fs/exec.c.
https://bugzilla.redhat.com/show_bug.cgi?id=656264
http://www.vupen.com/english/advisories/2011/0024
http://www.vmware.com/security/advisories/VMSA-2011-0012.html
http://www.securityfocus.com/bid/45028
http://www.securityfocus.com/archive/1/520102/100/0/threaded
http://www.redhat.com/support/errata/RHSA-2011-0007.html
http://www.redhat.com/support/errata/RHSA-2011-0004.html
http://www.openwall.com/lists/oss-security/2010/11/24/9
http://www.openwall.com/lists/oss-security/2010/11/23/2
http://www.mandriva.com/security/advisories?name=MDVSA-2011:029
http://secunia.com/advisories/46397
http://secunia.com/advisories/42890