CVE-2026-6069 CVE-2026-6069
A stack-based buffer overflow in NASM's disassembly function allows attackers to trigger out-of-bounds writes, potentially leading to code execution or crashes.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-6069?
CVE-2026-6069 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
NASM’s disasm() function contains a stack based buffer overflow when formatting disassembly output, allowing an attacker triggered out-of-bounds write when `slen` exceeds the buffer capacity.
Weakness: CWE-787
Which versions are affected by CVE-2026-6069?
It affects 1 product.
Products include Nasm Netwide Assembler.
How do I fix CVE-2026-6069?
No fix has been published for CVE-2026-6069 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-2026-6069 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-6069 exists.
Other vulnerabilities in Nasm Netwide Assembler
Sources
Also known as DEBIAN-CVE-2026-6069, GHSA-pfc2-7mmr-x54w, UBUNTU-CVE-2026-6069.