lease_init in fs/locks.c in Linux kernel before 2.6.16.16 allows attackers to cause a denial of service (fcntl_setlease lockup) via actions that cause lease_init to free a lock that might not have been allocated on the stack.
https://exchange.xforce.ibmcloud.com/vulnerabilities/26437
http://www.vupen.com/english/advisories/2006/1767
http://www.ubuntu.com/usn/usn-302-1
http://www.trustix.org/errata/2006/0028
http://www.securityfocus.com/bid/17943
http://www.novell.com/linux/security/advisories/2006_42_kernel.html
http://www.mandriva.com/security/advisories?name=MDKSA-2006:123
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.16.16
http://secunia.com/advisories/21179
http://secunia.com/advisories/21045