CVE-2025-49844

9.9 CRITICAL
Published: October 03, 2025 Modified: November 12, 2025

Description

Redis is an open source, in-memory database that persists on disk. Versions 8.2.1 and below allow an authenticated user to use a specially crafted Lua script to manipulate the garbage collector, trigger a use-after-free and potentially lead to remote code execution. The problem exists in all versions of Redis with Lua scripting. This issue is fixed in version 8.2.2. To workaround this issue without patching the redis-server executable is to prevent users from executing Lua scripts. This can be done using ACL to restrict EVAL and EVALSHA commands.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/redis/redis/releases/tag/8.2.2
Source: security-advisories@github.com
Release Notes
https://github.com/redis/redis/security/advisories/GHSA-4789-qfc9-5f9q
Source: security-advisories@github.com
Third Party Advisory
http://www.openwall.com/lists/oss-security/2025/10/07/2
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Third Party Advisory

4 reference(s) from NVD

Quick Stats

CVSS v3 Score
9.9 / 10.0
EPSS (Exploit Probability)
6.0%
90th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

lfprojects redis