CVE-2025-12875

Name: CVE-2025-12875
Creator: NVD / NIST
Published: 2025-11-07T21:15:40.557+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 1.9/10EPSS 0.14%

Last modified Jun 17, 2026

CVE-2025-12875 is a low-severity vulnerability rated 1.9/10 on the CVSS scale. 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. EPSS estimates a 0.14% chance of exploitation in the next 30 days.

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 a 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 used for attacks. This patch is called 93619f06dd378db6766666b30c08978311c7ec94. It is best practice to apply a patch to resolve this issue.

Metrics

CVSS 3.1

7.8/10

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

CVSS 4.0

1.9/10

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.14%

3.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Mruby	Mruby	3.4.0

References

https://github.com/makesoftwaresafe/mruby/commit/93619f06dd378db6766666b30c08978311c7ec94Patch
https://github.com/mruby/mruby/
https://github.com/mruby/mruby/issues/6650Issue Tracking
https://github.com/mruby/mruby/issues/6650#event-20443453808Issue Tracking
https://github.com/mruby/mruby/issues/6650#issuecomment-3430851605Patch
https://vuldb.com/?ctiid.331511Permissions Required, VDB Entry
https://vuldb.com/?id.331511Third Party Advisory, VDB Entry
https://vuldb.com/?submit.680879Third Party Advisory, VDB Entry
https://github.com/mruby/mruby/issues/6650Issue Tracking
https://github.com/mruby/mruby/issues/6650#issuecomment-3430851605Patch

Timeline

Published: Nov 7, 2025
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2025-12875?

How severe is CVE-2025-12875?

CVE-2025-12875 has a CVSS score of 1.9/10 (LOW severity). The EPSS model estimates a 0.14% probability of exploitation in the next 30 days.

How do I fix CVE-2025-12875?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-12875?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST