CVE-2025-49844

CRITICAL EPSS 99.7%
Published Oct 3, 20258mo ago · Modified Jun 17, 20261w ago
9.9 CVSS 3.1
Critical
Find Similar
Published Oct 3, 2025 8mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
9.9
Exploitability
3.1
Impact
6.0
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Changed
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
99.7% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 8

VendorProductVersionRange
redisredis* <6.2.20
redisredis*≥7.0  –  <7.2.11
redisredis*≥7.4.0  –  <7.4.6
redisredis*≥8.0.0  –  <8.0.4
redisredis*≥8.2.0  –  <8.2.2
lfprojectsvalkey* <7.2.11
lfprojectsvalkey*≥8.0.0  –  <8.0.6
lfprojectsvalkey*≥8.1.0  –  <8.1.4

References 5

  • openwall.com http://www.openwall.com/lists/oss-security/2025/10/07/2
    Mailing ListThird Party Advisory
  • github.com https://github.com/lastvocher/redis-CVE-2025-49844
  • github.com https://github.com/redis/redis/commit/d5728cb5795c966c5b5b1e0f0ac576a7e69af539
    Patch
  • github.com https://github.com/redis/redis/releases/tag/8.2.2
    Release Notes
  • github.com https://github.com/redis/redis/security/advisories/GHSA-4789-qfc9-5f9q
    Third Party Advisory

Remediation

  • github.com https://github.com/redis/redis/commit/d5728cb5795c966c5b5b1e0f0ac576a7e69af539
    Patch