Use After Free Vulnerability in NASM Netwide Assembler
CVE-2025-8842

4.8MEDIUM

Key Information:

Vendor

Nasm

Status
Netwide Assember
Vendor
CVE Published:
11 August 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-8842?

A vulnerability exists in the Netwide Assembler (NASM) in the do_directive function within preproc.c. This flaw results in a use after free condition, enabling attackers to potentially exploit the vulnerability locally. The exploit has been publicly disclosed, raising concerns about its impact on system security.

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-2025-8842 - Proof of Concept

References

https://vuldb.com/?id.319376
vdb-entrytechnical-description
https://vuldb.com/?ctiid.319376
signaturepermissions-required
https://vuldb.com/?submit.623184
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)
.