An issue was discovered in Irssi 1.0.0 and later. There is a use-after-free when a server is disconnected during netsplits.
Created irssi tracking bugs for this issue:
Affects: fedora-all [bug 1546318]
This issue did not affect the versions of Irssi as shipped with Red Hat Enterprise Linux 6 and 7, since the affected code was introduced in Irssi version 1.0.0.