CVE-2021-34552: Debian Linux

Critical severity, CVSS 9.8. EPSS: 3.2% chance of exploitation in the next 30 days.

Pillow through 8.2.0 and PIL (aka Python Imaging Library) through 1.1.7 allow an attacker to pass controlled parameters directly into a convert function to trigger a buffer overflow in Convert.c.

Affected products

• Debian Debian Linux: version 9.0 only
• Fedoraproject Fedora: version 33 only; version 34 only
• Python Pillow: from 1.0, up to and including 1.1.7; from 1.2, up to and including 8.2.0

Published 2021-07-13. Last modified 2026-06-17.