CVE-2021-20176: Debian Linux

Medium severity, CVSS 5.5. EPSS: 0.9% chance of exploitation in the next 30 days.

A divide-by-zero flaw was found in ImageMagick 6.9.11-57 and 7.0.10-57 in gem.c. This flaw allows an attacker who submits a crafted file that is processed by ImageMagick to trigger undefined behavior through a division by zero. The highest threat from this vulnerability is to system availability.

Affected products

• Debian Debian Linux: version 9.0 only
• ImageMagick ImageMagick: before 6.9.11-57 (fixed in 6.9.11-57); from 7.0.0-0, before 7.0.10-56 (fixed in 7.0.10-56)

Published 2021-02-06. Last modified 2026-06-17.