Redis Lua Use-After-Free may lead to remote code execution
100Vexday Risk Score
Patch now. It exploitation observed by VulnCheck and has a working public exploit.
ssvc Actcvss 10epss 87%
from disclosure to weapon0 days
Published on NVDOct 3
1st PoCApr 13
VulnCheck+81d
exploitation probability
87%top 1% of all CVEs
observed exploitation
yesVulnCheck
16 public exploit(s)
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Affected products
redis · redispublic PoCs found — 16
githubgithub.com/saneki/cve-2025-49844★ 25githubgithub.com/ksnnd32/redis_exploit★ 1githubgithub.com/Zain3311/CVE-2025-49844★ 1githubgithub.com/Cilectiy/CVE-2025-49844★ 1githubgithub.com/open-flaw/CVE-2025-49844★ 0githubgithub.com/zbyszkok/CVE-2025-49844-RediShell-AI-made-Revshell★ 0githubgithub.com/0xBlackash/CVE-2025-49844★ 0githubgithub.com/cc3305/CVE-2025-49844★ 0vulncheckvulncheck.com/xdb/33a716ddae72unverifiedvulncheckvulncheck.com/xdb/dfd27944e627unverifiedvulncheckvulncheck.com/xdb/307176e060ddunverifiedvulncheckvulncheck.com/xdb/ec5b732729feunverifiedvulncheckvulncheck.com/xdb/d8be47ccfd47unverifiedvulncheckvulncheck.com/xdb/f2e2e0f8c893unverifiedvulncheckvulncheck.com/xdb/8106ff045c2bunverifiedcve_referencegithub.com/lastvocher/redis-CVE-2025-49844unverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
References
https://github.com/lastvocher/redis-CVE-2025-49844https://github.com/redis/redis/commit/d5728cb5795c966c5b5b1e0f0ac576a7e69af539https://github.com/redis/redis/releases/tag/8.2.2https://github.com/redis/redis/security/advisories/GHSA-4789-qfc9-5f9qhttp://www.openwall.com/lists/oss-security/2025/10/07/2