CVE-2025-49844 Lfprojects — Exploit & Vulnerability Details CRITICAL

Parameter	Value
CVSS	9.9 (CRITICAL)
Affected Versions	7.0 — 8.2.2
Fixed In	8.2.2
Type	CWE-416 (Use After Free)
Vendor	Lfprojects
Public PoC	Yes

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.

Attack Parameters

Attack Vector

Network

Can be exploited remotely

Attack Complexity

Low

Easy to exploit

Privileges Required

Low

Basic privileges needed

User Interaction

None

No user interaction needed

Impact Assessment

Confidentiality

High

Complete data leak

Integrity

High

Complete data modification

Availability

High

Complete denial of service

CVSS Vector v3.1

Weakness Type (CWE)

CWE-416 Use After Free

Vulnerable Products 8

Configuration	From (including)	Up to (excluding)
Redis Redis cpe:2.3:a:redis:redis::::::::	—	`6.2.20`
Redis Redis cpe:2.3:a:redis:redis::::::::	`7.0`	`7.2.11`
Redis Redis cpe:2.3:a:redis:redis::::::::	`7.4.0`	`7.4.6`
Redis Redis cpe:2.3:a:redis:redis::::::::	`8.0.0`	`8.0.4`
Redis Redis cpe:2.3:a:redis:redis::::::::	`8.2.0`	`8.2.2`
Lfprojects Valkey cpe:2.3:a:lfprojects:valkey::::::::	—	`7.2.11`
Lfprojects Valkey cpe:2.3:a:lfprojects:valkey::::::::	`8.0.0`	`8.0.6`
Lfprojects Valkey cpe:2.3:a:lfprojects:valkey::::::::	`8.1.0`	`8.1.4`