CVE-2021-3470: Redislabs Redis

Medium severity, CVSS 5.3. EPSS: 1.1% chance of exploitation in the next 30 days.

A heap overflow issue was found in Redis in versions before 5.0.10, before 6.0.9 and before 6.2.0 when using a heap allocator other than jemalloc or glibc's malloc, leading to potential out of bound write or process crash. Effectively this flaw does not affect the vast majority of users, who use jemalloc or glibc malloc.

Affected products

• Redislabs Redis: before 5.0.10 (fixed in 5.0.10); from 6.0.0, before 6.0.9 (fixed in 6.0.9); version 6.2.0 only

Published 2021-03-31. Last modified 2026-06-17.