CVE-2020-25664: Fedoraproject Fedora

Medium severity, CVSS 6.1. EPSS: 0.7% chance of exploitation in the next 30 days.

In WriteOnePNGImage() of the PNG coder at coders/png.c, an improper call to AcquireVirtualMemory() and memset() allows for an out-of-bounds write later when PopShortPixel() from MagickCore/quantum-private.h is called. The patch fixes the calls by adding 256 to rowbytes. An attacker who is able to supply a specially crafted image could affect availability with a low impact to data integrity. This flaw affects ImageMagick versions prior to 6.9.10-68 and 7.0.8-68.

Affected products

• Fedoraproject Fedora: version 34 only
• ImageMagick ImageMagick: before 6.9.10-68 (fixed in 6.9.10-68); from 7.0.8, before 7.0.8-68 (fixed in 7.0.8-68)

Published 2020-12-08. Last modified 2026-06-17.