What is CVE-2022-1201?

CVE-2022-1201 is a medium-severity vulnerability in Mruby, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2022-04-02.

How severe is CVE-2022-1201?

Medium severity. CVSS v3 base score is 6.5 out of 10.

NULL pointer dereference in Mruby

CVE-2022-1201

NULL Pointer Dereference in mrb_vm_exec with super in GitHub repository mruby/mruby prior to 3.2. This vulnerability is capable of making the mruby interpreter crash, thus affecting the availability of the system.

Published 2022-04-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.004 (28.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Mruby
Mruby Mruby/mruby — versions unspecified

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

huntr.dev/bounties/6f930add-c9d8-4870-ae56-d4bd8354703b (Exploit, Third Party Advisory)
github.com/mruby/mruby/commit/00acae117da1b45b318dc36531a7b0021b8097ae (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2022-1201?: CVE-2022-1201 is a medium-severity vulnerability in Mruby, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2022-04-02.
How severe is CVE-2022-1201?: Medium severity. CVSS v3 base score is 6.5 out of 10.