CVE-2018-5208: Debian Linux

Critical severity, CVSS 9.8. EPSS: 2.4% chance of exploitation in the next 30 days.

In Irssi before 1.0.6, a calculation error in the completion code could cause a heap buffer overflow when completing certain strings.

Affected products

• Debian Debian Linux: version 9.0 only
• Irssi Irssi: before 1.0.6 (fixed in 1.0.6)

Published 2018-01-06. Last modified 2026-06-17.