Buffer overflow in InspIRCd before 1.1.18, when using the namesx and uhnames modules, allows remote attackers to cause a denial of service (daemon crash) via a large number of channel users with crafted nicknames, idents, and long hostnames.
Improper Restriction of Operations within the Bounds of a Memory Buffer The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary.