Several vulnerabilities have been discovered in Samba, which could result in information disclosure, denial of service or insufficient enforcement of security-relevant config directives. The version of Samba in the oldstable distribution cannot be fully supported further: If you are using Samba as a domain controller you should either upgrade to the stable distribution or if that"s not an immediate option consider to migrate to Samba from bullseye-backports . Operating Samba as a file/print server will continue to be supported, a separate DSA will provide an update update along with documentation about the scope of continued support.