Stack-Based Buffer Overflow in NASM Netwide Assembler Affects Local Security
CVE-2025-8846

4.8MEDIUM

Key Information:

Vendor

Nasm

Status
Netwide Assember
Vendor
CVE Published:
11 August 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-8846?

A stack-based buffer overflow vulnerability has been identified in the NASM Netwide Assembler version 2.17rc0, specifically within the parse_line function in parser.c. This vulnerability allows attackers to manipulate the handling of data, potentially leading to unauthorized access and control over the system. Since the exploit requires a local attack vector, it raises significant concerns about security for users of this assembler. Given that the vulnerability has been publicly disclosed, it is critical for users to apply any available patches or adhere to security best practices to mitigate potential threats.

Affected Version(s)

Netwide Assember 2.17rc0

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-2025-8846 - Proof of Concept

References

https://vuldb.com/?id.319380
vdb-entrytechnical-description
https://vuldb.com/?ctiid.319380
signaturepermissions-required
https://vuldb.com/?submit.623189
third-party-advisory

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
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

  • Vulnerability Reserved

Credit

xdcao (VulDB User)
.