CVE-2026-21863
Fixed in a distro release EPSS <1%CVSS 7.5
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.
Products: valkey-io valkey, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 9, Red Hat Hardened Images
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux 10 | valkey | 8.0.7-1.el10_1 |
| AlmaLinux 10 | valkey-devel | 8.0.7-1.el10_1 |
| AlmaLinux 9 | valkey | 8.0.7-1.el9_7 |
| AlmaLinux 9 | valkey-devel | 8.0.7-1.el9_7 |
| Alpine 3.21 | valkey | 7.2.12-r0 |
| Alpine 3.22 | valkey | 8.1.6-r0 |
| Alpine 3.23 | valkey | 9.0.3-r0 |
| Alpine 3.24 | valkey | 9.0.3-r0 |
| Debian 12 | redis | 5:7.0.15-1~deb12u7 |
| Debian 13 | redis | 5:8.0.2-3+deb13u2 |
| Debian 13 | valkey | 8.1.1+dfsg1-3+deb13u2 |
| Debian 14 | redict | 7.3.6+ds-2 |
| Debian 14 | redis | 5:8.0.6-1 |
| Debian 14 | valkey | 8.1.4+dfsg1-2 |
| Red Hat Enterprise Linux 10.1 | valkey | 0:8.0.7-1.el10_1 |
| Red Hat Enterprise Linux 10.1 | valkey-debuginfo | 0:8.0.7-1.el10_1 |
| Red Hat Enterprise Linux 10.1 | valkey-debugsource | 0:8.0.7-1.el10_1 |
| Red Hat Enterprise Linux 10.1 | valkey-devel | 0:8.0.7-1.el10_1 |
| Red Hat Enterprise Linux 9 | valkey | 0:8.0.7-1.el9_7 |
| Red Hat Enterprise Linux 9 | valkey-debuginfo | 0:8.0.7-1.el9_7 |
| Red Hat Enterprise Linux 9 | valkey-debugsource | 0:8.0.7-1.el9_7 |
| Red Hat Enterprise Linux 9 | valkey-devel | 0:8.0.7-1.el9_7 |
| Red Hat Enterprise Linux eus 10.0 | valkey | 0:8.0.7-1.el10_0 |
| Red Hat Enterprise Linux eus 10.0 | valkey-debuginfo | 0:8.0.7-1.el10_0 |
| Red Hat Enterprise Linux eus 10.0 | valkey-debugsource | 0:8.0.7-1.el10_0 |
| Red Hat Enterprise Linux eus 10.0 | valkey-devel | 0:8.0.7-1.el10_0 |
| Red Hat hummingbird 1 | valkey | 0:9.0.3-1.2.hum1 |
| Red Hat hummingbird 1 | valkey-compat-redis | 0:9.0.3-1.2.hum1 |
| Red Hat hummingbird 1 | valkey-compat-redis-devel | 0:9.0.3-1.2.hum1 |
| Red Hat hummingbird 1 | valkey-devel | 0:9.0.3-1.2.hum1 |
| Red Hat hummingbird 1 | valkey-doc | 0:9.0.3-1.2.hum1 |
| Red Hat hummingbird 1 | valkey-rdma | 0:9.0.3-1.2.hum1 |
| Rocky Linux 10 | valkey | 0:8.0.7-1.el10_1 |
| Rocky Linux 9 | valkey | 0:8.0.7-1.el9_7 |
| SUSE Linux Enterprise Module for Server Applications 15 SP7 | valkey | 8.0.7-150700.3.14.1 |
| Ubuntu 24.04 LTS | valkey | 7.2.12+dfsg1-0ubuntu0.1 |
| Ubuntu 25.10 | valkey | 8.1.6+dfsg1-0ubuntu0.1 |
| openSUSE Leap 15.6 | valkey | 8.0.7-150600.13.20.1 |
| openSUSE Tumbleweed | valkey | 9.0.3-1.1 |