CVE-2020-11656 Use after free in n/a

Critical 9.8 Published 9 Apr 2020 Updated 14 Oct 2026

A use-after-free flaw in SQLite's ALTER TABLE implementation allows attackers to potentially execute arbitrary code or cause a denial of service via crafted SQL queries.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2020-11656?

CVE-2020-11656 is a critical use after free vulnerability in Netapp Ontap Select Deploy Administration Utility, published on 9 Apr 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In SQLite through 3.31.1, the ALTER TABLE implementation has a use-after-free, as demonstrated by an ORDER BY clause that belongs to a compound SELECT statement.

Weakness: CWE-416

Which versions are affected by CVE-2020-11656?

1 open source package ship an affected version, including sqlite. It affects 12 products.

Package	Affected	Fixed in
`sqlite` Bitnami	All versions	`3.31.2`

Products include Netapp Ontap Select Deploy Administration Utility, Oracle Communications Messaging Server, Oracle Communications Network Charging and Control, Oracle Enterprise Manager Ops Center, Oracle Hyperion Infrastructure Technology, Oracle Mysql and 6 more.

How do I fix CVE-2020-11656?

Upgrade sqlite to 3.31.2 or later.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2020-11656 being exploited?

There is no known exploitation of CVE-2020-11656 in the wild and no public exploit code.

All Netapp Ontap Select Deploy Administration Utility vulnerabilities

Sources

Also known as AZL-38947, BIT-sqlite-2020-11656, DEBIAN-CVE-2020-11656, GHSA-x2v5-p27f-53wp.