CVE-2026-6067 CVE-2026-6067

High 7.5 Published 10 Apr 2026 Updated 10 Apr 2026

A heap buffer overflow in NASM allows attackers to execute arbitrary code or cause a crash by providing a malicious assembly file.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2026-6067?

CVE-2026-6067 is a high-severity memory corruption vulnerability in Nasm Netwide Assembler, published on 10 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-787

Which versions are affected by CVE-2026-6067?

It affects 1 product.

Products include Nasm Netwide Assembler.

How do I fix CVE-2026-6067?

Apply the vendor's patch.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2026-6067 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-6067 exists.

All Nasm Netwide Assembler vulnerabilities

Sources

Also known as DEBIAN-CVE-2026-6067, GHSA-6h49-94j7-p577, UBUNTU-CVE-2026-6067.