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.
https://www.talosintelligence.com/vulnerability_reports/TALOS-2021-1402
https://lists.debian.org/debian-lts-announce/2021/12/msg00003.html