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Heap-buffer-overflow in mrb_vm_exec

mruby Updated 02 Oct 2025

Summary

15/10/2021
HIGH
Yes i
High
Not published

OSV-2021-1448: Heap-buffer-overflow in mrb_vm_exec. Affects mruby versions >= dccd66f9efecd0a974b735c62836fe566015cf37, < 36efd018e2d297636a3aa2799d214a8675a14e0c. Fixed in 36efd018e2d297636a3aa2799d214a8675a14e0c. How to fix ↓

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OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=39947

Crash type: Heap-buffer-overflow WRITE 8
Crash state:
mrb_vm_exec
mrb_vm_run
mrb_top_run

How To Fix

Minimum fixed version

36efd018e2d297636a3aa2799d214a8675a14e0c

This is the first release that contains the fix.

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References

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Recent vulnerabilities recorded for mruby.

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How To Fix

Minimum fixed version

36efd018e2d297636a3aa2799d214a8675a14e0c

This is the first release that contains the fix.

Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →

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