This indicates an attack attempt to exploit an Information Disclosure vulnerability in Linux NFSv2 and NFSv3 servers.
The vulnerability is due to improper validation of the end of a buffer when handling a crafted write request. A remote attacker can exploit this to gain unauthorized access to sensitive information.
Linux kernel 4.10.13 and earlier
Information Disclosure: Remote attackers can gain sensitive information from vulnerable systems.
Apply the latest update from the vendor