High7.5Red Hat & Ubuntu Linux
Denial of Service via invalid clusterbus packet
CVE-2026-21863 Published Feb 23, 2026
CVE-2026-21863
Affected products & platforms
Red Hat & Ubuntu LinuxUnclassified
Summary
Denial of Service via invalid clusterbus packet. Red Hat rates this important (CVSS 7.5). Weakness: CWE-125. Affected package(s): valkey, valkey-main. Resolved in Red Hat advisory RHSA-2026:3507 — update the affected packages (`sudo dnf update`).
Affected versions
- valkey-0:8.0.7-1.el9_7
- valkey-main-9.0.3-1.2.hum1
- valkey-0:8.0.7-1.el10_0
- valkey-0:8.0.7-1.el10_1
Official advisory · high-confidence parse· fetched 6 hours ago·verify at source
Fixed versions
- RHSA-2026:3507
Official advisory · high-confidence parse· fetched 6 hours ago·verify at source
Mitigation checklist
Recommended fix / mitigation
- Update the affected package(s) to the fixed version shipped in RHSA-2026:3507 (`sudo dnf update` / `yum update`).
Official advisory · high-confidence parse· fetched 6 hours ago·verify at source
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