CVE-2025-49844: redis before 6.2.20 (exclusive), from 7.0 (inclusive), before 7.2.11 (exclusive), from 7.4.0 (inclusive), before 7.4.6…

Affected technology

redis · before 6.2.20 (exclusive)
redis

redis · from 7.0 (inclusive), before 7.2.11 (exclusive)
redis

redis · from 7.4.0 (inclusive), before 7.4.6 (exclusive)
redis

redis · from 8.0.0 (inclusive), before 8.0.4 (exclusive)
redis

redis · from 8.2.0 (inclusive), before 8.2.2 (exclusive)
redis

valkey · before 7.2.11 (exclusive)
lfprojects

valkey · from 8.0.0 (inclusive), before 8.0.6 (exclusive)
lfprojects

valkey · from 8.1.0 (inclusive), before 8.1.4 (exclusive)
lfprojects

redis · < 8.2.2
redis

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 3.1): Network (remote) · Low privileges required · No user interaction required

Attack conditions (NVD, CVSS 3.1): Network (remote) · Low privileges required · No user interaction required

What an attacker can do

An authenticated user can use a specially crafted Lua script to manipulate the garbage collector, trigger a use-after-free and potentially lead to remote code execution. Vendor/CNA’s CVSS 3.1 assessment (base score 9.9/10) rates confidentiality, integrity and availability impact as high. NVD’s CVSS 3.1 assessment (base score 9.9/10) rates confidentiality, integrity and availability impact as high.