Local privilege escalation for some sudo configurations has been fixed in systemd, the default init system in Debian.
For Debian 10 buster, this problem has been fixed in version 241-7~deb10u9.
We recommend that you upgrade your systemd packages.
For the detailed security status of systemd please refer to its security tracker page at: https://security-tracker.debian.org/tracker/systemd
Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS