For the stable distribution (bullseye), this problem has been fixed in
version 7.7.0+dfsg-2+deb11u3.
We recommend that you upgrade your heimdal packages.
For the detailed security status of heimdal please refer to its security
tracker page at:
https://security-tracker.debian.org/tracker/source-package/heimdal
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/
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