What is CVE-2022-0623?

CVE-2022-0623 is a critical-severity vulnerability in Mruby, classified under Out-of-bounds Read. CVSS score: 9.1/10. Published 2022-02-17.

How severe is CVE-2022-0623?

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

Out-of-bounds Read in Mruby

CVE-2022-0623

Out-of-bounds Read in Homebrew mruby prior to 3.2.

Vulnerability class: Buffer Overflow

Published 2022-02-17 · 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: 0.016 (75.5th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 75.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000

Affected products

Mruby
Mruby Mruby/mruby — versions unspecified

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

github.com/mruby/mruby/commit/ff3a5ebed6ffbe3e70481531cfb969b497aa73ad (Patch, Third Party Advisory)
huntr.dev/bounties/5b908ac7-d8f1-4fcd-9355-85df565f7580 (Exploit, Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2022-0623?: CVE-2022-0623 is a critical-severity vulnerability in Mruby, classified under Out-of-bounds Read. CVSS score: 9.1/10. Published 2022-02-17.
How severe is CVE-2022-0623?: Critical severity. CVSS v3 base score is 9.1 out of 10.