CVE-2020-36773: Artifex Ghostscript

Critical severity, CVSS 9.8. EPSS: 0.9% chance of exploitation in the next 30 days.

Artifex Ghostscript before 9.53.0 has an out-of-bounds write and use-after-free in devices/vector/gdevtxtw.c (for txtwrite) because a single character code in a PDF document can map to more than one Unicode code point (e.g., for a ligature).

Affected products

• Artifex Ghostscript: version 9.51 only; version 9.52 only; version 9.52.1 only; version 9.53.0 only

Published 2024-02-04. Last modified 2026-06-17.