Redisos 8.2 Release Notes

Redis Open Source 8.2.4 (February 2026)

Update urgency: SECURITY: There are security fixes in the release.

Security fixes

• RedisTimeSeries/RedisTimeSeries#1837, RedisJSON/RedisJSON#1474 Hide Personally Identifiable Information from server log.

Bug fixes

• RedisJSON/RedisJSON#1430 Malformed panic log messages (MOD-9365).
• RedisBloom/RedisBloom#945 Bloom filter: crash on RDB load on large number of filters (MOD-11590).
• RediSearch/RediSearch#6973 Correct empty string token counting in byteOffset calculations to ensure accurate text position tracking (MOD-11233).
• RediSearch/RediSearch#6995 Prevent FT.INFO command fanout to replicas to reduce unnecessary cluster traffic.
• RediSearch/RediSearch#7034 Correct goto statement handling on RDB load.
• RediSearch/RediSearch#7154 Display Background Indexing OOM warning in FT.AGGREGATE when memory limits are approached (MOD-11817).
• RediSearch/RediSearch#7219 Resolve concurrency issue in Reducer that caused intermittent errors (MOD-12243).
• RediSearch/RediSearch#7255 Correct BM25STD underflow wraparound to prevent incorrect scoring (MOD-12223).
• RediSearch/RediSearch#7264 Ensure accurate totalDocsLen updates to maintain correct document statistics (MOD-12234).
• RediSearch/RediSearch#7275 Report used memory as unsigned long to prevent overflow (RED-169833).
• RediSearch/RediSearch#7350 Allow FT.CREATE with LeanVec parameters on non-Intel architectures (RED-176382).
• RediSearch/RediSearch#7384 Reduce index load from RDB temporary memory overhead (MOD-12212).
• RediSearch/RediSearch#7435 Ensure full profile output on timeout with RETURN policy in FT.PROFILE (MOD-12320).
• RediSearch/RediSearch#7446 Remove outdated validation from debug aggregate in cluster mode (MOD-12435).
• RediSearch/RediSearch#7458 Correct GC regression that caused stability issues (MOD-12538).
• RediSearch/RediSearch#7459 Prevent potential double-free in Fork GC error path (MOD-12521).
• RediSearch/RediSearch#7470 Remove draining from Flush callback to avoid blocking.
• RediSearch/RediSearch#7499 Propagate HGETALL command in HDT mode (MOD-12662).
• RediSearch/RediSearch#7534 Reduce number of worker threads asynchronously to prevent performance degradation (MOD-12252, MOD-11658).
• RediSearch/RediSearch#7554 Handle Coordinator case when SCORE is sent alone without extra fields (MOD-12647).
• RediSearch/RediSearch#7561 Prevent memory corruption when freeing searchRequestCtx on error (MOD-12699).
• RediSearch/RediSearch#7685 Resolve cursor logical leak that could lead to resource exhaustion (MOD-12807).
• RediSearch/RediSearch#7710 Add support for WITHCOUNT in FT.AGGREGATE (MOD-11751).
• RediSearch/RediSearch#7794 Correctly handle binary data with embedded NULLs to prevent crashes (MOD-13010).
• RediSearch/RediSearch#7812 Correct SVS GC for no-workers case (MOD-12983).
• RediSearch/RediSearch#7873 Handle warnings in empty FT.AGGREGATE replies in cluster mode (MOD-12640).
• RediSearch/RediSearch#7886 Remove non-TEXT fields from spec's keys dictionary to prevent incorrect field handling (MOD-13150).
• RediSearch/RediSearch#7901 Support multiple warnings in reply to prevent warning loss (MOD-13252).
• RediSearch/RediSearch#8083 Correct FULLTEXT field metric count accuracy (MOD-13432).
• RediSearch/RediSearch#8153 Resolve config registration issue (RED-171841).
• RediSearch/RediSearch#7371 Validate search-min-operation-workers min value correctly (MOD-12383).
• RediSearch/RediSearch#8151 Correct FT.PROFILE shard total profile time calculation (MOD-13735, MOD-13181).
• RediSearch/RediSearch#7165 (Redis Enterprise only) FT.DROPINDEX as touches-arbitrary-keys for proper cluster handling causing crash on A-A (MOD-11090).
• RediSearch/RediSearch#7023 (Redis Enterprise only) Ensure all FT.SUG* commands are hashslot-aware to prevent cluster routing errors (MOD-11756).

Performance and resource utilization improvements

• RediSearch/RediSearch#7496 Vector search performance improvements (MOD-12011, MOD-12063, MOD-12629, MOD-12346).
• RediSearch/RediSearch#7694 Use asynchronous jobs in GC for SVS to reduce blocking (MOD-12668).

Metrics

• RediSearch/RediSearch#7614 Track timeout errors and warnings in info (MOD-12419).
• RediSearch/RediSearch#7646 Track maxprefixexpansions errors and warnings in info (MOD-12417).
• RediSearch/RediSearch#7957 Persist query warnings across cursor reads (MOD-12984).
• RediSearch/RediSearch#7341 Rename FT.PROFILE counter fields for clarity (MOD-6056).
• RediSearch/RediSearch#7436 Enhance FT.PROFILE with vector search execution details (MOD-12263).
• RediSearch/RediSearch#7737 Add Internal cursor reads metric to cluster FT.PROFILE output (MOD-12414).
• RediSearch/RediSearch#7692 Declare query error struct on _FT.CURSOR PROFILE (MOD-12955).
• RediSearch/RediSearch#7552 Add active_io_threads metric (MOD-12069, MOD-12695).
• RediSearch/RediSearch#7564 Add active_worker_threads metric (MOD-12694, MOD-12069).
• RediSearch/RediSearch#7623 Add active_coord_threads metric (MOD-12694, MOD-12069).
• RediSearch/RediSearch#7626 Add *_pending_jobs metrics for job queues (MOD-12069).
• RediSearch/RediSearch#7672 Add pending workers admin jobs metric (MOD-12069, MOD-12791).
• RediSearch/RediSearch#7732 Introduce active_topology_update_threads metric (MOD-12069, MOD-12790).
• RediSearch/RediSearch#7759 Extend indexing metrics for better observability (MOD-12070).

Configuration parameters

• RediSearch/RediSearch#7083 Add default scorer configuration option (MOD-10037)

Redis Open Source 8.2.3 (November 2025)

Update urgency: SECURITY: There is a security fix in the release.

Security fixes

• (CVE-2025-62507) XACKDEL - potential stack overflow and RCE

Bug fixes

• HGETEX - potential crash when FIELDS is used and numfields is missing
• Potential crash on HyperLogLog with 2GB+ entries
• Cuckoo filter - Division by zero in Cuckoo filter insertion
• Cuckoo filter - Counter overflow
• Bloom filter - Arbitrary memory read/write with invalid filter
• Bloom filter - Out-of-bounds access with empty chain
• Bloom filter - Restore invalid filter
• Top-k - Out-of-bounds access

Redis Open Source 8.2.2 (October 2025)

Update urgency: SECURITY: There are security fixes in the release.

Security fixes

• (CVE-2025-49844) A Lua script may lead to remote code execution
• (CVE-2025-46817) A Lua script may lead to integer overflow and potential RCE
• (CVE-2025-46818) A Lua script can be executed in the context of another user
• (CVE-2025-46819) LUA out-of-bound read

New Features

• #14223 VSIM: new EPSILON argument to specify maximum distance
• #Q6867, #Q6845 SVS-VAMANA: allow use of BUILD_INTEL_SVS_OPT flag for Intel optimisations (MOD-10920)

Bug fixes

• #14319 Potential crash on Lua script defrag
• #14323 Potential crash on streams and HFE defrag
• #14330 Potential use-after-free after pubsub and Lua defrag
• #14288 MEMORY USAGE: fix reported value
• #14259 XGROUP CREATE, XGROUP SETID: limit ENTRIESREAD value to the number of entries added to the stream
• #J1374 JSON.DEL doesn’t delete all matching object members / array elements (MOD-11032, MOD-11067)
• #P886 TDIGEST.CREATE crashes (OOM) on huge initialization values (MOD-10840)
• #Q6787 Potential shard restart while reindexing vectors on RDB loading (MOD-11011)
• #Q6676 Potential crash when using small CONSTRUCTION_WINDOW_SIZE on SVS-VAMANA (MOD-10771)
• #Q6701 Potential crash (OOM) in heavy updates due to a file descriptor leak (MOD-10975)
• #Q6723 Potential crash when using ACL rules (MOD-10748)
• #Q6641 INFO SEARCH: search_used_memory_indexes vector index memory value incorrect
• #Q6665 FT.PROFILE: more accurate execution duration measurements (MOD-10622)

Performance and resource utilization

• #Q6648 Improve RESP3 serialization performance (MOD-9687)

Metrics

• #Q6671 INFO SEARCH: new SVS-VAMANA metrics

Redis Open Source 8.2.1 (August 2025)

Update urgency: MODERATE: Program an upgrade of the server, but it's not urgent.

Bug fixes

• #14240 INFO KEYSIZES - potential incorrect histogram updates on cluster mode with modules.
• #14274 Disable Active Defrag during flushing replica.
• #14276 XADD or XTRIM can crash the server after loading RDB.
• #Q6601 Potential crash when running FLUSHDB (MOD-10681).

Performance and resource utilization

• Query Engine - LeanVec and LVQ proprietary Intel optimizations were removed from Redis Open Source.
• #Q6621 Fix regression in INFO (MOD-10779).

Redis Open Source 8.2 (August 2025)

This is the General Availability release of Redis 8.2 in Redis Open Source.

Headlines

Redis 8.2 introduces major performance and memory footprint improvements, new commands, and command extensions.

Major changes compared to 8.0

• Streams - new commands: XDELEX and XACKDEL; extension to XADD and XTRIM.
• Bitmap - BITOP: new operators: DIFF, DIFF1, ANDOR, and ONE.
• Query Engine - new SVS-VAMANA vector index type which supports vector compression.
• More than 15 performance and resource utilization improvements.
• New metrics: per-slot usage metrics, key size distributions for basic data types, and more.

Binary distributions

• Alpine and Debian Docker images - https://hub.docker.com/_/redis
• Install using snap - see https://github.com/redis/redis-snap
• Install using brew - see https://github.com/redis/homebrew-redis
• Install using RPM - see https://github.com/redis/redis-rpm
• Install using Debian APT - see https://github.com/redis/redis-debian

Redis 8.0.0 was tested on the following operating systems

• Ubuntu 22.04 (Jammy Jellyfish), 24.04 (Noble Numbat)
• Rocky Linux 8.10, 9.5
• AlmaLinux 8.10, 9.5
• Debian 12 (Bookworm)
• macOS 13 (Ventura), 14 (Sonoma), 15 (Sequoia)

Security fixes (compared to 8.2-RC1)

• (CVE-2025-32023) Fix out-of-bounds write in HyperLogLog commands.
• (CVE-2025-48367) Retry accepting other connections even if the accepted connection reports an error.

New Features (compared to 8.2-RC1)

• #14141 Keyspace notifications - new event types:
  • OVERWRITTEN - the value of a key is completely overwritten
  • TYPE_CHANGED - key type change

Bug fixes (compared to 8.2-RC1)

• #14162 Crash when using evport with I/O threads.
• #14163 EVAL crash when error table is empty.
• #14144 Vector sets - RDB format is not compatible with big endian machines.
• #14165 Endless client blocking for blocking commands.
• #14164 Prevent CLIENT UNBLOCK from unblocking CLIENT PAUSE.
• #14216 TTL was not removed by the SET command.
• #14224 HINCRBYFLOAT removes field expiration on replica.

Performance and resource utilization improvements (compared to 8.2-RC1)

• #Q6430 More compression variants for the SVS-VAMANA vector index.
• #Q6535 SHARD_K_RATIO parameter - favor network latency over accuracy for KNN vector query in a Redis cluster (unstable feature) (MOD-10359).
• #14144 Vector set - improve RDB loading / RESTORE speed by storing the worst link info .

Modules API

• #14051 RedisModule_Get*, RedisModule_Set* - allow modules to access Redis configurations.
• #14114 RM_UnsubscribeFromKeyspaceEvents - unregister a module from specific keyspace notifications.

Redis Open Source 8.2-RC1 (July 2025)

This is the first Release Candidate of Redis Open Source 8.2.

Release Candidates are feature-complete pre-releases. Pre-releases are not suitable for production use.

Headlines

Redis 8.2 introduces major performance and memory footprint improvements, new commands, and command extensions.

Redis 8.2-RC1 is available as a Docker image and can be downloaded from Docker Hub. Additional distributions will be introduced in upcoming pre-releases.

Security fixes (compared to 8.2-M01)

• (CVE-2025-27151) redis-check-aof may lead to stack overflow and potential RCE

New Features (compared to 8.2-M01)

• #14130 Streams - new commands: XDELEX and XACKDEL; extension to XADD and XTRIM.
• #14039 New command: CLUSTER SLOT-STATS - get per-slot usage metrics such as key count, CPU time, and network I/O.
• #14122 VSIM - new IN operator for filtering expressions.
• #Q6329, #Q6394 - Query Engine - new SVS-VAMANA vector index type which supports vector compression (optimized for Intel machines).

Bug fixes (compared to 8.2-M01)

• #14143 Gracefully handle short read errors for hashes with TTL during full sync.

Performance and resource utilization improvements (compared to 8.2-M01)

• #14103 Optimize BITCOUNT by introducing prefetching.
• #14121 Optimize SCAN by performing expiration checks only on DBs with volatile keys.
• #14140 Optimize expiry check in scanCallback.
• #14131 Optimize LREM, LPOS, LINSERT, ZRANK, and more by caching string2ll results in quicklistCompare.
• #14088 Optimize COPY, RENAME, and RESTORE when TTL is used.
• #14074 Reduce the overhead associated with tracking malloc’s usable memory.
• #13900 Optimize the client’s cron to avoid blocking the main thread.
• #J1350 JSON - memory footprint improvement by inlining numbers (MOD-9511).

Metrics

• #14067 INFO: used_memory_peak_time - time when used_memory_peak was hit.
• #13990 INFO:
  • master_current_sync_attempts - number of times the replica attempted to sync to a master since last disconnection.
  • master_total_sync_attempts - number of times the replica attempted to sync to a master.
  • master_link_up_since_seconds - number of seconds since the link has been up.
  • total_disconnect_time_sec - total cumulative time the replica has been disconnected.