A ffmpeg security update has been released for Debian GNU/Linux 10 to address several vulnerability.

DSA 4998-1: ffmpeg security update

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Debian Security Advisory DSA-4998-1 security@debian.org
  https://www.debian.org/security/ Moritz Muehlenhoff
October 31, 2021   https://www.debian.org/security/faq
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Package : ffmpeg
CVE ID : CVE-2020-20446 CVE-2020-20450 CVE-2020-20453 CVE-2020-22037
CVE-2020-22042 CVE-2021-38114 CVE-2021-38171 CVE-2021-38291
CVE-2020-21697 CVE-2020-21688 CVE-2020-20445

Several vulnerabilities have been discovered in the FFmpeg multimedia
framework, which could result in denial of service or potentially the
execution of arbitrary code if malformed files/streams are processed.

For the stable distribution (bullseye), these problems have been fixed in
version 7:4.3.3-0+deb11u1.

We recommend that you upgrade your ffmpeg packages.

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

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at:   https://www.debian.org/security/