CVE-2025-49844: Redis Lua Use-After-Free may lead to remote code execution
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.
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H · CWE-416
Tracked companies
Mapped from the CVE’s affected-product data, NVD CPE matches, vendor advisories or package feeds. A mapping means the vendor’s software is named, not that its hosted service was exposed.
Status incidents that name it
- · Maintenance · names this CVE
“[Scheduled] Remediation for Render KeyValue/Redis security bulletin: CVE-2025-49844 The scheduled maintenance has been completed.”
- · No impact listed · names this CVE
“Redis Security Advisory (CVE-2025-49844) Aptible has reviewed and addressed the Redis vulnerability described in <a…”
Affected vendors and products
redis: redis
References
- CVE record on cve.org (opens in new tab)
- NVD entry (opens in new tab)
- github.com/redis/redis/commit/d5728cb5795c966c5b5b1e0f0ac576a7e69af539 (opens in new tab)
- github.com/redis/redis/releases/tag/8.2.2 (opens in new tab)
- github.com/redis/redis/security/advisories/GHSA-4789-qfc9-5f9q (opens in new tab)
- CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (opens in new tab)
- This product uses data from the NVD API but is not endorsed or certified by the NVD. (opens in new tab)
- Known Exploited Vulnerabilities catalog from CISA. (opens in new tab)
- EPSS scores from FIRST (Exploit Prediction Scoring System). (opens in new tab)