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.

Metrics

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Access Vector Local

Access Complexity Low

Authentication Single

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact Partial

This CVE is not in the KEV list.

Exploitation poc

Automatable no

Technical Impact partial

Affected Vendors & Products

Vendors Products
Mruby
  • Mruby

No data.

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

Thu, 13 Nov 2025 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Mon, 10 Nov 2025 09:45:00 +0000

Type Values Removed Values Added
First Time appeared Mruby
Mruby mruby
Vendors & Products Mruby
Mruby mruby

Fri, 07 Nov 2025 20:45:00 +0000

Type Values Removed Values Added
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.
Title mruby array.c ary_fill_exec out-of-bounds write
Weaknesses CWE-119
CWE-787
References
Metrics cvssV2_0

{'score': 4.3, 'vector': 'AV:L/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:OF/RC:C'}

cvssV3_0

{'score': 5.3, 'vector': 'CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C'}

cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C'}

cvssV4_0

{'score': 4.8, 'vector': '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'}
cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published:

Updated: 2025-11-13T14:14:24.271Z

Reserved: 2025-11-07T15:09:38.806Z

Link: CVE-2025-12875

cve-icon Vulnrichment

Updated: 2025-11-13T14:13:38.353Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-11-07T21:15:40.557

Modified: 2025-11-13T15:15:49.763

Link: CVE-2025-12875

cve-icon Redhat

No data.