A systemd security update has been released for Debian GNU/Linux 10 LTS to address a buffer overrun.

[SECURITY] [DLA 3474-1] systemd security update

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Debian LTS Advisory DLA-3474-1 debian-lts@lists.debian.org
https://www.debian.org/lts/security/ Adrian Bunk
June 29, 2023 https://wiki.debian.org/LTS
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Package : systemd
Version : 241-7~deb10u10
CVE ID : CVE-2022-3821
Debian Bug : 1021644

A buffer overrun in format_timespan() has been fixed
in systemd, the default init system in Debian.

Additionally, fixes for getting property OnExternalPower via D-Bus
and a memory leak on daemon-reload are also included.

For Debian 10 buster, this problem has been fixed in version
241-7~deb10u10.

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