CVE-2021-46023 Null dereference in n/a

High 7.5 Published 14 Feb 2023 Updated 20 Mar 2025

An attacker can cause a denial of service via segmentation fault in the mruby interpreter by triggering an untrusted pointer dereference.

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

What is CVE-2021-46023?

CVE-2021-46023 is a high-severity vulnerability in n/a, published on 14 Feb 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An Untrusted Pointer Dereference was discovered in function mrb_vm_exec in mruby before 3.1.0-rc. The vulnerability causes a segmentation fault and application crash.

Weakness: CWE-119

Which versions are affected by CVE-2021-46023?

It affects 1 product.

Products include Mruby Mruby.

How do I fix CVE-2021-46023?

Upgrade to a fixed version.

Is CVE-2021-46023 being exploited?

There is no known exploitation of CVE-2021-46023 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2021-46023, GHSA-4g9q-c75g-jq7q, UBUNTU-CVE-2021-46023.