CVE-2021-20304: Openexr

High severity, CVSS 7.5. EPSS: 1.9% chance of exploitation in the next 30 days.

A flaw was found in OpenEXR's hufDecode functionality. This flaw allows an attacker who can pass a crafted file to be processed by OpenEXR, to trigger an undefined right shift error. The highest threat from this vulnerability is to system availability.

Affected products

• Openexr Openexr: up to and including 2.5.7

Published 2022-08-23. Last modified 2026-06-17.