The vulnerability was discovered way back in 2006 and goes on to prove no OS is secure. It has been referenced as CVE-2006-2451 and it exists in Linux Kernel 2.6.13 up to 2.6.17

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-2451

Are you trying out the exploit?