VulnerabilityModified
CVE-2018-12248
An issue was discovered in mruby 1.4.1.
HIGH 7.5EPSS 1.49%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.49%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 1.49% probability · 74th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-125
- Affected
- mruby/mruby
- Source
- cve@mitre.org
EPSS 1.5% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/mruby/mruby/commit/778500563a9f7ceba996937dc886bd8cde29b42bPatch, Third Party Advisory
- https://github.com/mruby/mruby/issues/4038Issue Tracking, Third Party Advisory
- https://github.com/mruby/mruby/commit/778500563a9f7ceba996937dc886bd8cde29b42bPatch, Third Party Advisory
- https://github.com/mruby/mruby/issues/4038Issue Tracking, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.