Malformed Valkey Cluster bus message can lead to Remote DoS (valkey-io valkey)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.85 % · percentile 58 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- GitHub_M
- NVD status
- Modified
Description
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.
Weaknesses (CWE)
- CWE-125 — Out-of-bounds Read
References
- https://github.com/valkey-io/valkey/security/advisories/GHSA-c677-q3wr-gggq
- https://access.redhat.com/security/cve/CVE-2026-21863
- https://bugzilla.redhat.com/show_bug.cgi?id=2442026
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-21863.json
- https://access.redhat.com/errata/RHSA-2026:5445
- https://access.redhat.com/errata/RHSA-2026:3443
- https://access.redhat.com/errata/RHSA-2026:3507
- https://access.redhat.com/errata/RHSA-2026:8753
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | GitHub_M |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | redhat-SADP |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD · security-advisories@github.com (Secondary) |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Secondary) |
European references
- ENISA EUVD · EUVD-2026-7513
- GCVE · GCVE-0-2026-21863
CERT-FR advisories
- CERTFR-2026-AVI-0223 — Multiples vulnérabilités dans les produits Microsoft · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:lfprojects:valkey:*:*:*:*:*:*:*:*< 7.2.12cpe:2.3:a:lfprojects:valkey:*:*:*:*:*:*:*:*≥ 8.0.0 < 8.0.7cpe:2.3:a:lfprojects:valkey:*:*:*:*:*:*:*:*≥ 8.1.0 < 8.1.6cpe:2.3:a:lfprojects:valkey:*:*:*:*:*:*:*:*≥ 9.0.0 < 9.0.2
Affected products
| Product | Versions |
|---|---|
| valkey-io · valkey | affected < 7.2.12 ; affected >= 8.0.0, < 8.0.7 ; affected >= 8.1.0, < 8.1.6 ; affected >= 9.0.0, < 9.0.2 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |