CVE-2021-40391: Debian Linux

Critical severity, CVSS 9.8. EPSS: 3% chance of exploitation in the next 30 days.

An out-of-bounds write vulnerability exists in the drill format T-code tool number functionality of Gerbv 2.7.0, dev (commit b5f1eacd), and the forked version of Gerbv (commit 71493260). A specially-crafted drill file can lead to code execution. An attacker can provide a malicious file to trigger this vulnerability.

Affected products

• Debian Debian Linux: version 9.0 only
• Fedoraproject Fedora: version 36 only
• Gerbv Project Gerbv: version 2.7.0 only

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