Use After Free Affecting valkey package, versions <0:8.0.9-1.el10_0


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

Exploit Maturity
Proof of Concept
EPSS
0.89% (55th percentile)

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  • Snyk IDSNYK-RHEL10-VALKEY-17370136
  • published18 Jun 2026
  • disclosed5 May 2026

Introduced: 5 May 2026

CVE-2026-23631  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade RHEL:10 valkey to version 0:8.0.9-1.el10_0 or higher.
This issue was patched in RHSA-2026:26540.

NVD Description

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

Redis is an in-memory data structure store. In all versions of redis-server with Lua scripting, an authenticated attacker can exploit the master-replica synchronization mechanism to trigger a use-after-free on replicas where replica-read-only is disabled or can be disabled, which may lead to remote code execution. A workaround is to prevent users from executing Lua scripts or avoid using replicas where replica-read-only is disabled. This is patched in version 8.6.3.

CVSS Base Scores

version 3.1