PT-2025-45500 · Mruby · Mruby

Tjbecker · Published 2025-11-07 · Updated 2025-11-08 · CVE-2025-12875

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions mruby version 3.4.0

Description A flaw exists in mruby version 3.4.0 within the ary fill exec function located in the file mrbgems/mruby-array-ext/src/array.c. Manipulation of the start and length arguments can result in an out-of-bounds write. This issue requires local access to exploit. The exploit code has been publicly released.

Recommendations Apply patch 93619f06dd378db6766666b30c08978311c7ec94.

Exploit

Fix

Memory Corruption

Buffer Overflow

Weakness Enumeration

CWE-787

CWE-119

Related Identifiers

CVE-2025-12875

Affected Products

Mruby

References · 17

• 🔥 https://github.com/mruby/mruby/issues/6650#issuecomment-3430851605 · Exploit
• 🔥 https://github.com/mruby/mruby/issues/6650 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2025-12875 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2025-12875 · Vendor Advisory
• https://github.com/makesoftwaresafe/mruby/commit/93619f06dd378db6766666b30c08978311c7ec94 · Patch
• https://security-tracker.debian.org/tracker/CVE-2025-12875 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-12875 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2025-12875 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-12875 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2025-12875 · Security Note
• https://github.com/mruby/mruby/issues/6650#event-20443453808 · Note
• https://vuldb.com/?id.331511 · Note
• https://vuldb.com/?ctiid.331511 · Note
• https://twitter.com/VulmonFeeds/status/1987077001195237768 · Twitter Post
• https://github.com/mruby/mruby · Note