CVE-2019-6978: Canonical Ubuntu Linux

Critical severity, CVSS 9.8. EPSS: 4.5% chance of exploitation in the next 30 days.

The GD Graphics Library (aka LibGD) 2.2.5 has a double free in the gdImage*Ptr() functions in gd_gif_out.c, gd_jpeg.c, and gd_wbmp.c. NOTE: PHP is unaffected.

Affected products

• Canonical Ubuntu Linux: version 14.04 only; version 16.04 only; version 18.04 only; version 18.10 only
• Debian Debian Linux: version 8.0 only; version 9.0 only
• Libgd Libgd: version 2.2.5 only

Published 2019-01-28. Last modified 2026-06-17.