CVE-2026-6069

HIGH

NASM - Stack-Based Buffer Overflow in disasm() Function

Title source: llm

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.

References (1)

Core 1

Core References

https://github.com/netwide-assembler/nasm/issues/217

Scores

CVSS v3 7.5

EPSS 0.0044

EPSS Percentile 35.1%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment

Exploitation poc

Automatable yes

Technical Impact partial

Details

CWE

CWE-787

Status published

Products (2)

NASM/NASM nasm-3.02rc5

nasm/netwide_assembler 3.02 rc5

Published Apr 10, 2026

Tracked Since Apr 10, 2026