Race condition in the hvc_close function in drivers/char/hvc_console.c in the Linux kernel before 2.6.34 allows local users to cause a denial of service or possibly have unspecified other impact by closing a Hypervisor Virtual Console device, related to the hvc_open and hvc_remove functions.
https://bugzilla.redhat.com/show_bug.cgi?id=568621
http://www.openwall.com/lists/oss-security/2010/07/07/5
http://www.openwall.com/lists/oss-security/2010/07/06/7
http://www.openwall.com/lists/oss-security/2010/07/01/1
http://www.openwall.com/lists/oss-security/2010/04/19/2
http://www.openwall.com/lists/oss-security/2010/04/19/1
http://www.openwall.com/lists/oss-security/2010/04/18/1