What is CVE-2022-0717?

CVE-2022-0717 is a critical-severity vulnerability in Mruby, classified under Out-of-bounds Read. CVSS score: 9.1/10. Published 2022-02-23.

How severe is CVE-2022-0717?

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

Out-of-bounds Read in Mruby

CVE-2022-0717

Out-of-bounds Read in GitHub repository mruby/mruby prior to 3.2.

Vulnerability class: Buffer Overflow

Published 2022-02-23 · 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: 0.009 (58.9th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 58.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Mruby
Mruby Mruby/mruby — versions unspecified

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

huntr.dev/bounties/27a851a5-7ebf-409b-854f-b2614771e8f9 (Exploit, Third Party Advisory)
github.com/mruby/mruby/commit/f72315575f78a9a773adbce0ee7d3ec33434cb76 (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2022-0717?: CVE-2022-0717 is a critical-severity vulnerability in Mruby, classified under Out-of-bounds Read. CVSS score: 9.1/10. Published 2022-02-23.
How severe is CVE-2022-0717?: Critical severity. CVSS v3 base score is 9.1 out of 10.