Heap-Based Buffer Overflow in mruby Product by mruby Vendor
CVE-2025-7207

4.8MEDIUM

Key Information:

Vendor

mruby

Status
Mruby
Vendor
CVE Published:
9 July 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-7207?

A heap-based buffer overflow vulnerability exists in the scope_new function of the mruby compiler's nregs handler, found in the mrbgems/mruby-compiler/core/codegen.c file. This issue can be exploited locally, leading to potentially severe consequences for affected systems. Publicly disclosed, security experts recommend applying the patch identified by commit 1fdd96104180cc0fb5d3cb086b05ab6458911bb9 to mitigate risks associated with this vulnerability.

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Affected Version(s)

mruby 3.4.0-rc1

mruby 3.4.0-rc2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-7207 - Proof of Concept

References

https://vuldb.com/?id.315156
vdb-entrytechnical-description
https://vuldb.com/?ctiid.315156
signaturepermissions-required
https://vuldb.com/?submit.607683
third-party-advisory

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

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