A flac security update has been released for Debian GNU/Linux 10 to address a possible out of bounds write due to a missing bounds check.

DLA 3094-1: flac security update

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Debian LTS Advisory DLA-3094-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Utkarsh Gupta
September 04, 2022   https://wiki.debian.org/LTS
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Package : flac
Version : 1.3.2-3+deb10u2
CVE ID : CVE-2021-0561
Debian Bug : 1006339

In append_to_verify_fifo_interleaved_ of stream_encoder.c, there is
a possible out of bounds write due to a missing bounds check. This
could lead to local information disclosure with no additional
execution privileges needed.

For Debian 10 buster, this problem has been fixed in version
1.3.2-3+deb10u2.

We recommend that you upgrade your flac packages.

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

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