Buffer overflow in Nasm
CVE-2026-6069
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.
Vulnerability class: Buffer Overflow
EPSS: 0.004 (35.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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-2026-6069?
- CVE-2026-6069 is a high-severity vulnerability in Nasm, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2026-04-10.
- How severe is CVE-2026-6069?
- High severity. CVSS v3 base score is 7.5 out of 10.