CVE-2025-46819— Redis is vulnerable to DoS via specially crafted LUA scripts
Quick assessment
Affected
redis redis
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Redis是美国Redis公司的一套开源的使用ANSI C编写、支持网络、可基于内存亦可持久化的日志型、键值（Key-Value）存储数据库，并提供多种语言的API。 Redis 8.2.1及之前版本存在输入验证错误漏洞，该漏洞源于特制LUA脚本可能导致越界数据读取或服务器崩溃，从而导致拒绝服务。
Possible ATT&CK Techniques 1 AI
T1496 · Resource Hijacking
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I. Basic Information for CVE-2025-46819
Vulnerability Information
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Vulnerability Title
Redis is vulnerable to DoS via specially crafted LUA scripts
Source: CVE Program / CVE List V5
Vulnerability 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 read out-of-bound data or crash the server and subsequent denial of service. 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 block a script by restricting both the EVAL and FUNCTION command families.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5
Vulnerability Title
Redis 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Redis是美国Redis公司的一套开源的使用ANSI C编写、支持网络、可基于内存亦可持久化的日志型、键值（Key-Value）存储数据库，并提供多种语言的API。 Redis 8.2.1及之前版本存在输入验证错误漏洞，该漏洞源于特制LUA脚本可能导致越界数据读取或服务器崩溃，从而导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2025-46819
| # | POC Description | Source Link | Shenlong Link |
|---|---|---|---|
| 1 | CVE-2025-46819 – Redis Lua Long-String Delimiter Out-of-Bounds Read | https://github.com/dwisiswant0/CVE-2025-46819 | POC Details |
| 2 | 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 read out-of-bound data or crash the server and subsequent denial of service. 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 block a script by restricting both the EVAL and FUNCTION command families. | https://github.com/projectdiscovery/nuclei-templates/blob/main/javascript/cves/2025/CVE-2025-46819.yaml | POC Details |
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Same Patch Batch · redis · 2025-10-03 · 4 CVEs total
| CVE-2025-49844 | 10.0 CRITICAL | Redis Lua Use-After-Free may lead to remote code execution |
| CVE-2025-46817 | 7.0 HIGH | Lua library commands may lead to integer overflow and potential RCE |
| CVE-2025-46818 | 6.0 MEDIUM | Redis: Authenticated users can execute LUA scripts as a different user |
IV. Related Vulnerabilities
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Same vendor: redis
-
CVE-2026-81934
Redis TLS pending-data list use-after-free -
CVE-2026-66373
Redis 资源管理错误漏洞 -
CVE-2026-25243
redis-server RESTORE invalid memory access may allow remote -
CVE-2026-23631
redis-server Lua use-after-free may allow remote code execut -
CVE-2026-23479
redis-server use-after-free in unblock client flow may allow
V. Comments for CVE-2025-46819
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