---
title: "CVE-2025-49844: Redis Lua Use-After-Free may lead… | CubePath"
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…"
language: en
source: https://cubepath.com/security/cve/CVE-2025-49844
---

# CVE-2025-49844: Redis Lua Use-After-Free may lead… | CubePath

## 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.

Official description from the CVE record, published by GitHub\_M. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2025-49844)

## Key data

### CVSS 3.1 Critical 10.0

Score published by GitHub\_M in the CVE record.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

| Metric                 | Value   | What it means                                                                       |
| ---------------------- | ------- | ----------------------------------------------------------------------------------- |
| Attack vector          | Network | The vulnerable component can be reached over a network, possibly from the Internet. |
| Attack complexity      | Low     | No special conditions are needed. The attack can be repeated at will.               |
| Privileges required    | Low     | A basic user account is needed.                                                     |
| User interaction       | None    | No action from any user is needed.                                                  |
| Scope                  | Changed | The impact can reach other components beyond the vulnerable one.                    |
| Confidentiality impact | High    | Serious or total effect on the secrecy of data.                                     |
| Integrity impact       | High    | Serious or total effect on the trustworthiness of data.                             |
| Availability impact    | High    | Serious or total effect on availability.                                            |

CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) .

### EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score

0.82638 (82.6% probability)

Percentile

99.7%

Scores of

Nov 10, 2026

Model

v2026.06.15

### CISA assessment as of Mar 20, 2026

Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA.

Exploitation

Public proof of concept recorded by CISA

Automatable

no

Technical impact

total

### Weakness (CWE)

CWE catalog version 5.0.

CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license.

- [CWE-416](https://cwe.mitre.org/data/definitions/416.html) Use After Free

## Affected products

Products listed in the CVE record, as the CNA published them.

- redis

  - affected: < 8.2.2

## References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

- [github.com/redis/redis/security/advisories/GHSA-4789-qfc9-5…](https://github.com/redis/redis/security/advisories/GHSA-4789-qfc9-5f9q)
- [github.com/redis/redis/commit/d5728cb5795c966c5b5b1e0f0ac57…](https://github.com/redis/redis/commit/d5728cb5795c966c5b5b1e0f0ac576a7e69af539)
- [github.com/redis/redis/releases/tag/8.2.2](https://github.com/redis/redis/releases/tag/8.2.2)
- [openwall.com/lists/oss-security/2025/10/07/2](http://www.openwall.com/lists/oss-security/2025/10/07/2)

## Timeline

1. ID reserved Jun 11, 2025
2. Record published Oct 3, 2025
3. Record last updated Mar 20, 2026

## Look up another CVE

## About CubePath

CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection.

[Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection)

Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 20:03 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)