CVE-2025-49844
Redis Lua Use-After-Free may lead to remote code execution
- Published
- Oct 3, 2025
- Updated
- Mar 20, 2026
- Assigning CNA
- GitHub_M
- Evidence observed
- Aug 6, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:HHigh · next 30 days
- Percentile
- 99.7%
- Model date
- Oct 15, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
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.
Sources
javascript/cves/2025/CVE-2025-49844.yaml
Nuclei TemplatesDeclared conditions
- verification: dsl($.matchers[*].type)
CVE-2025-49844
- CVE-2025-49844Scanner
Scanner and educational guide for CVE-2025-49844 (RediShell), a Redis Lua scripting use-after-free vulnerability. Checks Redis servers for exposure, provides remediation steps, and explains the exploit mechanics for learning purposes.
- CVE-2025-49844Exploit
Exploit script for CVE-2025-49844, a use-after-free vulnerability in Redis Lua scripting enabling remote code execution. Targets specific Redis Alpine and Bookworm builds with JOP gadgets.
- CVE-2025-49844Exploit
CVE-2025-49844
- CVE-2025-49844Exploit
Proof-of-concept exploit for Redis 8.2.1 Lua parser use-after-free, racing garbage collection via crafted loadstring calls to achieve remote code execution.
Scans Redis instances for CVE-2025-49844 (RediShell) critical RCE vulnerability, detecting vulnerable versions and Lua scripting status with concurrent multi-target support.
Educational lab environment with a proof-of-concept exploit for CVE-2025-49844 (RediShell), a critical use-after-free in Redis Lua interpreter, including Docker setup and vulnerability analysis.
Educational lab environment demonstrating CVE-2025-49844 (RediShell) in Redis. Includes Docker setup, exploit PoC script, and security recommendations for patching and hardening.
CVE-2025-49844 (RediShell)
- CVE-2025-49844Exploit
Exploit script for CVE-2025-49844, a use-after-free vulnerability in Redis Lua parser, enabling remote code execution on vulnerable Redis servers.
🔍 Explore and test the CVE-2025-49844 (RediShell) vulnerability in Redis with this practical lab environment for secure education and research.
Proof-of-concept exploit for CVE-2025-49844, a Redis Lua script remote code execution vulnerability, demonstrating exploitation and providing technical details for authorized security testing.
Proof-of-concept exploit for CVE-2025-49844 targeting a Redis heap vulnerability, with GDB-assisted crash analysis and fuzzing attempts to achieve code execution.
- cve-2025-49844Exploit
Proof-of-concept for CVE-2025-49844
- CVE-2025-49844Exploit
Exploit CVE-2025-49844 Redis Lua UAF vulnerability to execute arbitrary shellcode and establish persistent backdoor access on vulnerable Redis instances.
Untested completition of the Redishell PoC made by AI
Responsible use
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