A flaw was found in the way samba implemented DCE/RPC. If a client to a Samba server sent a very large DCE/RPC request, and chose to fragment it, an attacker could replace later fragments with their own data, bypassing the signature requirements.
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-23192.json"