CVE-2020-27842: Debian Linux

Medium severity, CVSS 5.5. EPSS: 1.5% chance of exploitation in the next 30 days.

There's a flaw in openjpeg's t2 encoder in versions prior to 2.4.0. An attacker who is able to provide crafted input to be processed by openjpeg could cause a null pointer dereference. The highest impact of this flaw is to application availability.

Affected products

• Debian Debian Linux: version 9.0 only; version 10.0 only
• Fedoraproject Extra Packages For Enterprise Linux: version 7.0 only
• Fedoraproject Fedora: version 32 only; version 33 only
• Oracle Outside In Technology: version 8.5.5 only
• Red Hat Codeready Linux Builder: version 8.0 only
• Red Hat Codeready Linux Builder For IBM Z Systems: version 8.0 only
• Red Hat Codeready Linux Builder For Power Little Endian: version 8.0 only
• Red Hat Enterprise Linux: version 8.0 only
• Red Hat Enterprise Linux For IBM Z Systems: version 8.0 only
• Red Hat Enterprise Linux For Power Little Endian: version 8.0 only
• Uclouvain Openjpeg: before 2.4.0 (fixed in 2.4.0)

Published 2021-01-05. Last modified 2026-06-17.