What’s Vulnerable › Vulnerabilities

CVE-2018-12248

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-06-12 · updated 2026-06-17
• Weakness: CWE-125

Description

An issue was discovered in mruby 1.4.1. There is a heap-based buffer over-read associated with OP_ENTER because mrbgems/mruby-fiber/src/fiber.c does not extend the stack in cases of many arguments to fiber.

Affected products

• mruby/mruby: 1.4.1

References

• https://github.com/mruby/mruby/commit/778500563a9f7ceba996937dc886bd8cde29b42b
• https://github.com/mruby/mruby/issues/4038
• https://github.com/mruby/mruby/commit/778500563a9f7ceba996937dc886bd8cde29b42b
• https://github.com/mruby/mruby/issues/4038

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