CVE-2021-3476: Debian Linux

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

A flaw was found in OpenEXR's B44 uncompression functionality in versions before 3.0.0-beta. An attacker who is able to submit a crafted file to OpenEXR could trigger shift overflows, potentially affecting 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.