CVE-2025-46819: redis Integer Overflow or Wraparound

Vulnerability summary

CVE-2025-46819 is a high (CVSS 7.1) Integer Overflow or Wraparound vulnerability in redis. EPSS estimates a 1.06% chance of exploitation in the next 30 days, higher than 63.9% of scored vulnerabilities.

Timeline

1. 03-10-2025
   PublishedVulnerability first disclosed.
2. 31-10-2025
   Last modifiedVulnerability information updated.

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.

• CWE-190Integer Overflow or WraparoundThe product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
• CWE-125Out-of-bounds ReadThe product reads data past the end, or before the beginning, of the intended buffer.