CVE-2021-20300: Debian Linux

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

A flaw was found in OpenEXR's hufUncompress functionality in OpenEXR/IlmImf/ImfHuf.cpp. This flaw allows an attacker who can submit a crafted file that is processed by OpenEXR, to trigger an integer overflow. The highest threat from this vulnerability is to system availability.

Affected products

• Debian Debian Linux: version 10.0 only
• Openexr Openexr: before 2.5.4 (fixed in 2.5.4)

Published 2022-03-04. Last modified 2026-06-17.