Upgrade urgency HIGH: There is a critical bug that may affect a subset of users.

Bug fixes

• Fix ZDIFF algorithm 2 memory leak on early exit (#3342)
• Strictly check CRLF when parsing querybuf (#2872)
• Fix incorrect memory overhead calculation for watched keys (#3359)
• Fix valkey-cli --cluster del-node for unreachable nodes (#3209)
• Fix race condition during async client freeing with IO threading enabled (#3458)
• Fix double free in stream consumer PEL loading with corrupt RDB data (#3498)
• Fixes server crash when RDMA benchmark clients disconnect (#3448)
• Fix misleading log "I/O error reading bulk count from PRIMARY: Success" (#3580)
• Handle NULL pointer in streamTrim listpack delta calculation (#3591)
• Fix Deferred Reply Placeholders in Active Deferred Buffers (#3578)
• Add NULL check in updateSSLPendingFlag (#3641)
• Fix heap-use-after-free in ACL LOAD when client free is deferred (#3800)
• Redacting customer information when hide_user_data_from_log is true in rdb.c, networking.c, debug.c and t_hash (#3872)
• Fix use-after-free in VM_RegisterClusterMessageReceiver (#3846)
• Harden SENTINEL commands and config rewrite against control-character injection (#3847)
• Fix CLUSTER SLOTS crash when called from module timer callback (#2915)

Full Changelog: https://github.com/valkey-io/valkey/compare/8.1.7...8.1.8