Buffer overflow in Nasm
CVE-2026-6067
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 leadi…
Vulnerability class: Buffer Overflow
EPSS: 0.004 (28.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
Affected products
- Nasm — versions nasm-3.02rc5
- Nasm Netwide_assembler — versions 3.02
Weakness classification (CWE)
References
- cret@cert.org (Exploit, Issue Tracking)
Frequently asked questions
- What is CVE-2026-6067?
- CVE-2026-6067 is a medium-severity vulnerability in Nasm, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2026-04-10.
- How severe is CVE-2026-6067?
- Medium severity. CVSS v3 base score is 5.5 out of 10.