CVE-2018-20546: Canonical Ubuntu Linux

High severity, CVSS 8.1. EPSS: 2.3% chance of exploitation in the next 30 days.

There is an illegal READ memory access at caca/dither.c (function get_rgba_default) in libcaca 0.99.beta19 for the default bpp case.

Affected products

• Canonical Ubuntu Linux: version 12.04 only; version 14.04 only; version 16.04 only; version 18.04 only; version 18.10 only
• Debian Debian Linux: version 8.0 only
• Fedoraproject Fedora: version 34 only; version 35 only; version 36 only
• Libcaca Project Libcaca: version 0.99 only
• Opensuse Leap: version 15.0 only

Published 2018-12-28. Last modified 2026-06-17.