CVE-2020-4033: Canonical Ubuntu Linux

Medium severity, CVSS 6.5. EPSS: 1.8% chance of exploitation in the next 30 days.

In FreeRDP before version 2.1.2, there is an out of bounds read in RLEDECOMPRESS. All FreeRDP based clients with sessions with color depth < 32 are affected. This is fixed in version 2.1.2.

Affected products

• Canonical Ubuntu Linux: version 18.04 only; version 20.04 only
• Debian Debian Linux: version 10.0 only
• Fedoraproject Fedora: version 31 only; version 32 only
• Freerdp Freerdp: before 2.1.2 (fixed in 2.1.2)
• Opensuse Leap: version 15.1 only

Published 2020-06-22. Last modified 2026-06-17.