CVE-2025-8843 NASM Netwide Assember outmacho.c macho_no_dead_strip heap-based overflow
A heap-based buffer overflow in NASM allows local attackers to execute arbitrary code or cause denial of service via crafted input.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-8843?
CVE-2025-8843 is a medium-severity memory corruption vulnerability in Nasm Netwide Assembler, published on 11 Aug 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability was found in NASM Netwide Assember 2.17rc0. This affects the function macho_no_dead_strip of the file outmacho.c. The manipulation leads to heap-based buffer overflow. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used.
Which versions are affected by CVE-2025-8843?
It affects 1 product.
Products include Nasm Netwide Assembler.
How do I fix CVE-2025-8843?
No fix has been published for CVE-2025-8843 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-8843 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-8843 exists.
Other vulnerabilities in Nasm Netwide Assembler
Sources
Also known as AZL-66210, AZL-66233, DEBIAN-CVE-2025-8843, GHSA-fr9x-hqv8-c4hf, UBUNTU-CVE-2025-8843.