Use After Free Affecting valkey-devel package, versions <0:8.0.9-1.el9_8


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
1.29% (67th percentile)

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  • Snyk IDSNYK-RHEL9-VALKEYDEVEL-16743451
  • published18 May 2026
  • disclosed5 May 2026

Introduced: 5 May 2026

CVE-2026-23479  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade RHEL:9 valkey-devel to version 0:8.0.9-1.el9_8 or higher.
This issue was patched in RHSA-2026:25925.

NVD Description

Note: Versions mentioned in the description apply only to the upstream valkey-devel package and not the valkey-devel package as distributed by RHEL. See How to fix? for RHEL:9 relevant fixed versions and status.

Redis is an in-memory data structure store. In redis-server from 7.2.0 until 8.6.3, the unblock client flow does not handle an error return from processCommandAndResetClient when re-executing a blocked command. If a blocked client is evicted during this flow, an authenticated attacker can trigger a use-after-free that may lead to remote code execution. This has been patched in version 8.6.3.

CVSS Base Scores

version 3.1