This indicates an attack attempt to exploit a Denial of Service Vulnerability in Wind River Systems VxWorks.
A remote, unauthenticated attacker can exploit this vulnerability by sending TCP segments with spoofed source IP address of a TCP endpoint connected to a vulnerable service on VxWorks. One of these packets will cause the TCP connection to abnormally terminate. In this manner, an attacker can affect a denial-of-service by arbitrarily terminating any TCP connection that a vulnerable VxWorks has open.
Wind River Systems VxWorks 6.5 and above
Denial of Service: Remote attackers can crash vulnerable systems.
Apply the most recent upgrade or patch from the vendor.