CVE-2025-12875

5.3 MEDIUM
Published: November 07, 2025 Modified: December 02, 2025

Description

A weakness has been identified in mruby 3.4.0. This vulnerability affects the function ary_fill_exec of the file mrbgems/mruby-array-ext/src/array.c. Executing manipulation of the argument start/length can lead to out-of-bounds write. The attack needs to be launched locally. The exploit has been made available to the public and could be exploited. This patch is called 93619f06dd378db6766666b30c08978311c7ec94. It is best practice to apply a patch to resolve this issue.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/mruby/mruby/issues/6650
Source: cna@vuldb.com
Issue Tracking
https://vuldb.com/?ctiid.331511
Source: cna@vuldb.com
Permissions Required VDB Entry
https://vuldb.com/?id.331511
Source: cna@vuldb.com
Third Party Advisory VDB Entry
https://vuldb.com/?submit.680879
Source: cna@vuldb.com
Third Party Advisory VDB Entry
https://github.com/mruby/mruby/issues/6650
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Issue Tracking
https://github.com/mruby/mruby/issues/6650#issuecomment-3430851605
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Patch

9 reference(s) from NVD

Quick Stats

CVSS v3 Score
5.3 / 10.0
EPSS (Exploit Probability)
0.0%
2th percentile
Exploitation Status
Not in CISA KEV

Affected Vendors

mruby