CVE-2009-1959: Irssi

Medium severity, CVSS 5.0. EPSS: 8.4% chance of exploitation in the next 30 days.

Off-by-one error in the event_wallops function in fe-common/irc/fe-events.c in irssi 0.8.13 allows remote IRC servers to cause a denial of service (crash) via an empty command, which triggers a one-byte buffer under-read and a one-byte buffer underflow.

Affected products

• Irssi Irssi: version 0.8.13 only

Published 2009-06-08. Last modified 2026-06-16.