CVE-2020-8955: Debian Linux

Critical severity, CVSS 9.8. EPSS: 3.7% chance of exploitation in the next 30 days.

irc_mode_channel_update in plugins/irc/irc-mode.c in WeeChat through 2.7 allows remote attackers to cause a denial of service (buffer overflow and application crash) or possibly have unspecified other impact via a malformed IRC message 324 (channel mode).

Affected products

• Debian Debian Linux: version 8.0 only; version 9.0 only
• Fedoraproject Fedora: version 30 only; version 31 only; version 32 only
• Opensuse Backports Sle: version 15.0 only
• Opensuse Leap: version 15.1 only
• Weechat Weechat: from 0.3.8, up to and including 2.7

Published 2020-02-12. Last modified 2026-06-17.