CVE-2021-3474: Debian Linux

Medium severity, CVSS 5.3. EPSS: 1.8% chance of exploitation in the next 30 days.

There's a flaw in OpenEXR in versions before 3.0.0-beta. A crafted input file that is processed by OpenEXR could cause a shift overflow in the FastHufDecoder, potentially leading to problems with application availability.

Affected products

• Debian Debian Linux: version 9.0 only; version 10.0 only
• Openexr Openexr: before 2.4.3 (fixed in 2.4.3); from 2.5.0, before 2.5.4 (fixed in 2.5.4)

Published 2021-03-30. Last modified 2026-06-17.