CVE-2017-5193: A NULL pointer dereference in the nickcmp function.
CVE-2017-5194: Use after free when receiving invalid nick message.
CVE-2017-5356: Out of bounds read when Printing the value.
CVE-2017-5195: Out of bounds read in certain incomplete control codes.
CVE-2017-5196: Out of bounds read in certain incomplete character sequences.