Out-of-bounds Read Affecting valkey package, versions <0:8.0.7-1.el10_1


Severity

Recommended
high

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.02% (5th percentile)

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  • Snyk IDSNYK-ORACLE10-VALKEY-15363667
  • published28 Feb 2026
  • disclosed23 Feb 2026

Introduced: 23 Feb 2026

NewCVE-2026-21863  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade Oracle:10 valkey to version 0:8.0.7-1.el10_1 or higher.
This issue was patched in ELSA-2026-3443.

NVD Description

Note: Versions mentioned in the description apply only to the upstream valkey package and not the valkey package as distributed by Oracle. See How to fix? for Oracle:10 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1