Fedora 42 Valkey 8.0.7 Critical DoS Threat Update 2026

Valkey is an advanced key-value store. It is often referred to as a data structure server since keys can contain strings, hashes, lists, sets and sorted sets. You can run atomic operations on these types, like appending to a string; incrementing the value in a hash; pushing to a list; computing set intersection, union and difference; or getting the member with highest ranking in a sorted set. In order to achieve its outstanding performance, Valkey works with an in-memory dataset. Depending on your use case, you can persist it either by dumping the dataset to disk every once in a while, or by appending each command to a log. Valkey also supports trivial-to-setup master-slave replication, with very fast non-blocking first synchronization, auto-reconnection on net split and so forth. Other features include Transactions, Pub/Sub, Lua scripting, Keys with a limited time-to-live, and configuration settings to make Valkey behave like a cache. You can use Valkey from most programming languages also. Update Information : Valkey 8.0.7 - Released Mon 23 February 2026 Upgrade urgency SECURITY: This release includes security fixes we recommend you apply as soon as possible. Security fixes (CVE-2026-21863) Remote DoS with malformed Valkey Cluster bus message (CVE-2025-67733) RESP Protocol Injection via Lua error_reply Bug fixes Fix ltrim should not call signalModifiedKey when no elements are removed (#2787) Fix chained replica crash when doing dual channel replication (#2983) Fix used_memory_dataset underflow due to miscalculated used_memory_overhead (#3005) Avoids crash during MODULE UNLOAD when ACL rules reference a module command and subcommand (#3160) Fix server assert on ACL LOAD and resetchannels (#3182) Fix bug causing no response flush sometimes when IO threads are busy (#3205)

Valkey is an advanced key-value store. It is often referred to as a data

structure server since keys can contain strings, hashes, lists, sets and

You can run atomic operations on these types, like appending to a string;

incrementing the value in a hash; pushing to a list; computing set

intersection, union and difference; or getting the member with highest

ranking in a sorted set.

In order to achieve its outstanding performance, Valkey works with an

in-memory dataset. Depending on your use case, you can persist it either

by dumping the dataset to disk every once in a while, or by appending

each command to a log.

Valkey also supports trivial-to-setup master-slave replication, with very

fast non-blocking first synchronization, auto-reconnection on net split

Other features include Transactions, Pub/Sub, Lua scripting, Keys with a

limited time-to-live, and configuration settings to make Valkey behave like

You can use Valkey from most programming languages also.

Valkey 8.0.7 - Released Mon 23 February 2026 Upgrade urgency SECURITY: This release includes security fixes we recommend you apply as soon as possible. Security fixes (CVE-2026-21863) Remote DoS with malformed Valkey Cluster bus message (CVE-2025-67733) RESP Protocol Injection via Lua error_reply Bug fixes Fix ltrim should not call signalModifiedKey when no elements are removed (#2787) Fix chained replica crash when doing dual channel replication (#2983) Fix used_memory_dataset underflow due to miscalculated used_memory_overhead (#3005) Avoids crash during MODULE UNLOAD when ACL rules reference a module command and subcommand (#3160) Fix server assert on ACL LOAD and resetchannels (#3182) Fix bug causing no response flush sometimes when IO threads are busy (#3205)

* Tue Feb 24 2026 Remi Collet - 8.0.7-1 - Valkey 8.0.7 - Released Mon 23 February 2026 - Upgrade urgency SECURITY: This release includes security fixes

* Tue Feb 24 2026 Remi Collet - 8.0.7-1 - Valkey 8.0.7 - Released Mon 23 February 2026 - Upgrade urgency SECURITY: This release includes security fixes

[ 1 ] Bug #2442220 - CVE-2025-67733 valkey: Valkey: Data tampering and denial of service via improper null character handling in Lua scripts [fedora-all] [ 2 ] Bug #2442231 - CVE-2026-21863 valkey: Valkey: Denial of Service via invalid clusterbus packet [fedora-all]

[ 1 ] Bug #2442220 - CVE-2025-67733 valkey: Valkey: Data tampering and denial of service via improper null character handling in Lua scripts [fedora-all] [ 2 ] Bug #2442231 - CVE-2026-21863 valkey: Valkey: Denial of Service via invalid clusterbus packet [fedora-all]

This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-1d05f1d152' at the command line. For more information, refer to the dnf documentation available at

This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-1d05f1d152' at the command line. For more information, refer to the dnf documentation available at