CVE-2021-21900: Debian Linux

High severity, CVSS 8.8. EPSS: 2.5% chance of exploitation in the next 30 days.

A code execution vulnerability exists in the dxfRW::processLType() functionality of LibreCad libdxfrw 2.2.0-rc2-19-ge02f3580. A specially-crafted .dxf file can lead to a use-after-free vulnerability. An attacker can provide a malicious file to trigger this vulnerability.

Affected products

• Debian Debian Linux: version 9.0 only; version 10.0 only; version 11.0 only
• Fedoraproject Fedora: version 34 only; version 35 only
• Librecad Libdxfrw: version 2.2.0-rc2-19-ge02f3580 only

Published 2021-11-19. Last modified 2026-06-17.