CVE-2026-21863

Vulnerability overview

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 pro...

Affected product and versions

Product

valkey-io valkey, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support

Affected versions

>= < 7.2.12, >= >= 8.0.0, < 8.0.7, >= >= 8.1.0, < 8.1.6, >= >= 9.0.0, < 9.0.2, < 7.2.12, >= 8.0.0 < 8.0.7, >= 8.1.0 < 8.1.6, >= 9.0.0 < 9.0.2

Fixed versions

7.2.12, 8.0.7, 8.1.6, 9.0.2

Technical data

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-125