CVE-2026-6067 — MEDIUM (5.5)

Vulnerability Description

A heap buffer overflow vulnerability exists in the Netwide Assembler (NASM) due to a lack of bounds checking in the obj_directive() function. This vulnerability can be exploited by a user assembling a malicious .asm file, potentially leading to heap memory corruption, denial of service (crash), and arbitrary code execution.

CVSS Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Nasm	Netwide Assembler	3.02

Related Weaknesses (CWE)

CWE-787

References

https://github.com/netwide-assembler/nasm/issues/203ExploitIssue Tracking

FAQ

What is CVE-2026-6067?

CVE-2026-6067 is a vulnerability with a CVSS score of 5.5 (MEDIUM). A heap buffer overflow vulnerability exists in the Netwide Assembler (NASM) due to a lack of bounds checking in the obj_directive() function. This vulnerability can be exploited by a user assembling a...

How severe is CVE-2026-6067?

CVE-2026-6067 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-6067?

Check the references section above for vendor advisories and patch information. Affected products include: Nasm Netwide Assembler.