A gnutls28 security update has been released for Debian GNU/Linux 10 LTS to address a timing side channel.

DLA 3321-1: gnutls28 security update

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Debian LTS Advisory DLA-3321-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Markus Koschany
February 18, 2023   https://wiki.debian.org/LTS
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Package : gnutls28
Version : 3.6.7-4+deb10u10
CVE ID : CVE-2023-0361

Hubert Kario discovered a timing side channel in the RSA decryption
implementation of the GNU TLS library.

For Debian 10 buster, this problem has been fixed in version
3.6.7-4+deb10u10.

We recommend that you upgrade your gnutls28 packages.

For the detailed security status of gnutls28 please refer to
its security tracker page at:
  https://security-tracker.debian.org/tracker/gnutls28

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