What’s Vulnerable › Vulnerabilities

CVE-2022-1201: NULL Pointer Dereference in mrb_vm_exec with super in mruby/mruby

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-04-02 · updated 2026-06-17
• Weakness: CWE-476

Description

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.

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/00acae117da1b45b318dc36531a7b0021b8097ae
• https://huntr.dev/bounties/6f930add-c9d8-4870-ae56-d4bd8354703b
• https://github.com/mruby/mruby/commit/00acae117da1b45b318dc36531a7b0021b8097ae
• https://huntr.dev/bounties/6f930add-c9d8-4870-ae56-d4bd8354703b

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