VULNERABILITY INTELLIGENCE

CVE-2020-15866

CVSS score9.8 CRITICAL

EPSS probability2.13%

CISA KEVNot currently listed

Published2020-07-21

Last modified2026-06-17

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

mruby through 2.1.2-rc has a heap-based buffer overflow in the mrb_yield_with_class function in vm.c because of incorrect VM stack handling. It can be triggered via the stack_copy function.

Weakness classification

nvd@nist.gov: CWE-787

Primary references

cve@mitre.org — Exploit, Third Party Advisory
cve@mitre.org — Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Mailing List, Third Party Advisory