This indicates an attack attempt against a Denial of Service vulnerability in the Linux 2.6 Kernel.
The vulnerability is caused by an error in the IP stack component which generates ICMP response messages. It allows remote attackers to cause a DoS condition by sending a crafted IP packet to the target.
Linux Kernel 2.6.13 to 188.8.131.52
Denial of Service: Remote attackers can crash vulnerable systems.
Upgrade the Linux Kernel to 184.108.40.206 or above.