IBM DB2 for Linux UNIX and Windows (includes DB2 Connect Server) 9.7 10.1 10.5 11.1 and 11.5 is vulnerable to a denial of service caused by improper handling of Secure Sockets Layer (SSL) renegotiation requests. By sending specially-crafted requests a remote attacker could exploit this vulnerability to increase the resource usage on the system. IBM X-Force ID: 178507.