CVE-2020-21468 Denial of service in n/a

High 7.5 Published 20 Sep 2021 Updated 9 Jul 2026

A segmentation fault in Redis server can cause a denial of service, though the vendor cannot reproduce the issue in released versions.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2020-21468?

CVE-2020-21468 is a high-severity denial of service vulnerability in n/a, published on 20 Sep 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Which versions are affected by CVE-2020-21468?

It affects 1 product.

Products include Redislabs Redis.

How do I fix CVE-2020-21468?

No fix has been published for CVE-2020-21468 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2020-21468 being exploited?

There is no known exploitation of CVE-2020-21468 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2020-21468, GHSA-vjmv-w2p6-c95q.