CVE-2022-1071 User after free in mrb_vm_exec in mruby/mruby

High 7.7 Published 26 Mar 2022 Updated 2 Aug 2024

An attacker can exploit a use-after-free flaw in the mruby VM to potentially execute arbitrary code or cause a denial of service.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: Available

What is CVE-2022-1071?

CVE-2022-1071 is a high-severity use after free vulnerability in mruby/mruby, published on 26 Mar 2022. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

User after free in mrb_vm_exec in GitHub repository mruby/mruby prior to 3.2.

Weakness: CWE-416

Which versions are affected by CVE-2022-1071?

It affects 1 product.

Products include Mruby Mruby.

How do I fix CVE-2022-1071?

Upgrade to a fixed version.

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-2022-1071 being exploited?

There is no known exploitation of CVE-2022-1071 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2022-1071, GHSA-pv86-xgr9-75fj, UBUNTU-CVE-2022-1071.