This indicates an attack attempt to exploit a Privilege Escalation vulnerability in Linux Kernel.
The vulnerability is due to an error in the way Linux kernel's memory subsystem handles copy-on-write (COW). A remote attacker may be able to exploit this to leverage their privileges on vulnerable systems.
Linux Kernel after 2.6.22
Privilege Escalation: Remote attackers can leverage their privileges on vulnerable systems.
Apply the most recent upgrade or patch from the vendor.