CVE-2025-12875

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.

CVSS v3 5.3 MEDIUM
CVSS v2.0 4.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.4

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact LOW

Scope UNCHANGED

4.3^/10

CVSS v2.0 : MEDIUM

Vector : AV:L/AC:L/Au:S/C:P/I:P/A:P

Exploitability : 3.1 / Impact : 6.4

Access Vector LOCAL

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://github.com/makesoftwaresafe/mruby/commit/93619f06dd378db6766666b30c08978311c7ec94
https://github.com/mruby/mruby/issues/6650
https://github.com/mruby/mruby/issues/6650#event-20443453808
https://github.com/mruby/mruby/issues/6650#issuecomment-3430851605
https://vuldb.com/?ctiid.331511
https://vuldb.com/?id.331511
https://vuldb.com/?submit.680879
https://github.com/mruby/mruby/issues/6650
https://github.com/mruby/mruby/issues/6650#issuecomment-3430851605

Configurations

No configuration.

History

13 Nov 2025, 15:15

Type	Values Removed	Values Added
References	~~() https://github.com/mruby/mruby/issues/6650 -~~	() https://github.com/mruby/mruby/issues/6650 -
References	~~() https://github.com/mruby/mruby/issues/6650#issuecomment-3430851605 -~~	() https://github.com/mruby/mruby/issues/6650#issuecomment-3430851605 -

07 Nov 2025, 21:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-11-07 21:15

Updated : 2025-11-13 15:15

NVD link : CVE-2025-12875

Mitre link : CVE-2025-12875

CVE.ORG link : CVE-2025-12875

JSON object : View

Products Affected

No product.

CWE

CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer

CWE-787

Out-of-bounds Write

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