CVE-2021-46020

Name: CVE-2021-46020
Creator: NVD / NIST
Published: 2022-01-14T20:15:15.477+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.04%

Last modified Jun 17, 2026

CVE-2021-46020 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. An untrusted pointer dereference in mrb_vm_exec() of mruby v3.0.0 can lead to a segmentation fault or application crash.. EPSS estimates a 1.04% chance of exploitation in the next 30 days.

Description

An untrusted pointer dereference in mrb_vm_exec() of mruby v3.0.0 can lead to a segmentation fault or application crash.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

1.04%

59.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-119

Affected Software

Vendor	Product	Versions
Mruby	Mruby	3.0.0

References

https://github.com/mruby/mruby/issues/5613Exploit, Issue Tracking, Third Party Advisory
https://github.com/mruby/mruby/issues/5613Exploit, Issue Tracking, Third Party Advisory

Timeline

Published: Jan 14, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-46020?

An untrusted pointer dereference in mrb_vm_exec() of mruby v3.0.0 can lead to a segmentation fault or application crash.

How severe is CVE-2021-46020?

CVE-2021-46020 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.04% probability of exploitation in the next 30 days.

How do I fix CVE-2021-46020?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-46020?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST