Use-after-free in Redis - CVE-2026-23479
Published: May 5, 2026
Vulnerability identifier: #VU130202
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-23479
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Redis Labs
Affected software:
Redis
Redis
Detailed vulnerability description
The vulnerability allows a remote user to execute arbitrary code.
The vulnerability exists due to use-after-free in the unblock client flow when a blocked client is evicted while re-executing a blocked command. A remote user can trigger this condition to execute arbitrary code.
The issue occurs because processCommandAndResetClient does not handle an error return value in this flow.
How to mitigate CVE-2026-23479
Install security update from vendor's website.