Five vulnerabilities have been located in Irssi
A NULL pointer dereference in the nickcmp function found by Joseph Bisch. (CWE-690) Use after free when receiving invalid nick message (Issue #466, CWE-146) Out of bounds read in certain incomplete control codes found by Joseph Bisch. (CWE-126) Out of bounds read in certain incomplete character sequences found by Hanno BÃ¶ck and independently by J. Bisch. (CWE-126) Out of bounds read when Printing the value '%['. Found by Hanno BÃ¶ck. (CWE-126)
These issues may result in denial of service (remote crash).