CVE-2020-27844: Debian Linux

High severity, CVSS 7.8. EPSS: 1.4% chance of exploitation in the next 30 days.

A flaw was found in openjpeg's src/lib/openjp2/t2.c in versions prior to 2.4.0. This flaw allows an attacker to provide crafted input to openjpeg during conversion and encoding, causing an out-of-bounds write. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Affected products

• Debian Debian Linux: version 9.0 only
• Oracle Outside In Technology: version 8.5.5 only
• Uclouvain Openjpeg: before 2.4.0 (fixed in 2.4.0)

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