A gnutls28 security update has been released for Debian GNU/Linux 10 to address two issues.

DLA 3070-1: gnutls28 security update

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Debian LTS Advisory DLA-3070-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Emilio Pozuelo Monfort
August 11, 2022   https://wiki.debian.org/LTS
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Package : gnutls28
Version : 3.6.7-4+deb10u9
CVE ID : CVE-2021-4209 CVE-2022-2509

Two issues were found in GnuTLS, a library implementing the TLS and SSL
protocols. A remote attacker could take advantage of these flaws to
cause an application using the GnuTLS library to crash (denial of
service), or potentially, to execute arbitrary code.

For Debian 10 buster, these problems have been fixed in version
3.6.7-4+deb10u9.

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