irssi up to 1.0.5 Channel Topic NULL Pointer Dereference denial of service

A vulnerability was found in irssi up to 1.0.5 (Messaging Software). It has been rated as problematic. Affected by this issue is an unknown part of the component Channel Topic Handler. Upgrading to version 1.0.6 eliminates this vulnerability. A possible mitigation has been published 3 days after the disclosure of the vulnerability.