tftpd_file.c in atftp through 0.7.4 has a buffer overflow because buffer-size handling does not properly consider the combination of data, OACK, and other options.
https://sourceforge.net/p/atftp/code/ci/d255bf90834fb45be52decf9bc0b4fb46c90f205/
https://lists.debian.org/debian-lts-announce/2021/11/msg00014.html
https://github.com/nu11secur1ty/CVE-mitre/tree/main/CVE-2021-41054