What is CVE-2022-1106?

CVE-2022-1106 is a critical-severity vulnerability in Mruby, classified under Use After Free. CVSS score: 9.1/10. Published 2022-03-27.

How severe is CVE-2022-1106?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Use After Free in Mruby

CVE-2022-1106

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

Vulnerability class: Use-After-Free

Published 2022-03-27 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.

EPSS exploit prediction

EPSS: 0.010 (60.4th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 60.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: -0.001

Affected products

Mruby
Mruby Mruby/mruby — versions unspecified

Weakness classification (CWE)

CWE-416 — Use After Free

References

huntr.dev/bounties/16b9d0ea-71ed-41bc-8a88-2deb4c20be8f (Exploit, Patch, Third Party Advisory)
github.com/mruby/mruby/commit/7f5a490d09f4d56801ac3a3e4e39e03e1471b44c (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2022-1106?: CVE-2022-1106 is a critical-severity vulnerability in Mruby, classified under Use After Free. CVSS score: 9.1/10. Published 2022-03-27.
How severe is CVE-2022-1106?: Critical severity. CVSS v3 base score is 9.1 out of 10.