Stack-Based Buffer Overflow in NASM Netwide Assembler Affects Local Systems
CVE-2025-8845

4.8MEDIUM

Key Information:

Vendor

Nasm

Status
Netwide Assember
Vendor
CVE Published:
11 August 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-8845?

A vulnerability has been detected in the NASM Netwide Assembler, specifically in version 2.17rc0. This issue resides within the 'assemble_file' function in the source file nasm.c, which is prone to a stack-based buffer overflow. The flaw allows attackers to manipulate local operations, posing a risk of execution of arbitrary code or crashing the application. This exploit has been made public, indicating the potential for active misuse among malicious actors.

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-2025-8845 - Proof of Concept

References

https://vuldb.com/?id.319379
vdb-entrytechnical-description
https://vuldb.com/?ctiid.319379
signaturepermissions-required
https://vuldb.com/?submit.623188
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)
.