CVE-2026-21863
High · 7.5CVSS
7.5
EPSS
0.8%
Published
Feb 23, 2026
CISA due date
—
The record
Valkey is a distributed key-value database. Prior to versions 9.0.2, 8.1.6, 8.0.7, and 7.2.12, a malicious actor with access to the Valkey clusterbus port can send an invalid packet that may cause an out bound read, which might result in the system crashing. The Valkey clusterbus packet processing code does not validate that a clusterbus ping extension packet is located within buffer of the clusterbus packet before attempting to read it. Versions 9.0.2, 8.1.6, 8.0.7, and 7.2.12 fix the issue. As an additional mitigation, don't expose the cluster bus connection directly to end users, and protect the connection with its own network ACLs.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| SUSE:Linux Enterprise Module for Server Applications 15 SP7 | valkey | 0 | 8.0.7-150700.3.14.1 |
| openSUSE:Leap 15.6 | valkey | 0 | 8.0.7-150600.13.20.1 |
| openSUSE:Tumbleweed | valkey | 0 | 9.0.3-1.1 |
Related vulnerabilities
- CVE-2025-67733 Valkey is a distributed key-value database. Also affects valkey
- CVE-2025-49844 Redis is an open source, in-memory database that persists on disk. Also affects valkey
- CVE-2026-23631 Redis is an in-memory data structure store. Also affects valkey
- CVE-2026-25243 Redis is an in-memory data structure store. Also affects valkey
- CVE-2026-23479 Redis is an in-memory data structure store. Also affects valkey
- CVE-2026-27623 Valkey is a distributed key-value database. Also affects valkey
- CVE-2024-46981 Redis is an open source, in-memory database that persists on disk. Also affects valkey
- CVE-2024-51741 Redis is an open source, in-memory database that persists on disk. Also affects valkey