Samba: the CTDB protocol has bounds checking issues. CTDB fails to perform integrity checking of received packets, including failure to validate field lengths against packet boundaries during unmarshalling, inadequate string null-termination checks, and missing packet length sanity checks. These can cause denial of service via crashes or memory exhaustion and may expose adjacent memory contents. Primarily affects the unauthenticated, unencrypted CTDB private network protocol; some issues affect the local Unix domain socket event protocol. Affects all Samba versions since 4.2. Fixed in 4.24.5, 4.23.10 and 4.22.11.