What’s Vulnerable › Vulnerabilities

CVE-2022-1427: Out-of-bounds Read in mrb_obj_is_kind_of in in mruby/mruby

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-04-23 · updated 2026-06-17
• Weakness: CWE-125

Description

Out-of-bounds Read in mrb_obj_is_kind_of in in GitHub repository mruby/mruby prior to 3.2. # Impact: Possible arbitrary code execution if being exploited.

Affected products

• mruby/mruby: before 3.2 — fixed in 3.2

How to fix

Upgrade to a fixed version: mruby/mruby 3.2. Check the vendor advisory for mitigations.

References

• https://github.com/mruby/mruby/commit/a4d97934d51cb88954cc49161dc1d151f64afb6b
• https://huntr.dev/bounties/23b6f0a9-64f5-421e-a55f-b5b7a671f301
• https://github.com/mruby/mruby/commit/a4d97934d51cb88954cc49161dc1d151f64afb6b
• https://huntr.dev/bounties/23b6f0a9-64f5-421e-a55f-b5b7a671f301

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