---
id: CVE-2020-21468
title: >-
  A segmentation fault in the redis-server component of Redis 5.0.7 leads to a
  denial of service (DOS)
summary: >-
  A segmentation fault in the redis-server component of Redis 5.0.7 leads to a
  denial of service (DOS). NOTE: the vendor cannot reproduce this issue in a
  released version, such as 5.0.7.
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
vendor: redislabs
product: redis
affected:
  - redis = 5.0.7
published: '2021-09-20'
updated: '2026-07-05'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2020-21468'
references:
  - url: 'https://github.com/antirez/redis/issues/6633'
    label: cve@mitre.org
  - url: 'http://redis.com'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://github.com/antirez/redis/issues/6633'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.01202
epssPercentile: 0.66917
ingestedAt: '2026-07-06T01:08:17.033Z'
---

## Overview

A segmentation fault in the redis-server component of Redis 5.0.7 leads to a denial of service (DOS). NOTE: the vendor cannot reproduce this issue in a released version, such as 5.0.7.

## Affected

- `redis = 5.0.7`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.