NASM vulnerabilities

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Published CVEs affecting NASM products: 3 record(s), with severity, exploitation and fixes.

Netwide Assembler 3 NASM 3

Exploited only (KEV) →

CVE-2026-6069 High · 7.5 CWE-787 Apr 10, 2026

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.

CVE-2026-6068 Critical · 9.6 CWE-416 Apr 10, 2026

NASM contains a heap use after free vulnerability in response file (-@) processing where a dangling pointer to freed memory is stored in the global depend_file and later dereferenced, as the response-file buffer is freed before the pointer is used, allowing for data corruption or remote code execution.

CVE-2026-6067 Medium · 5.5 CWE-787 Apr 10, 2026

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 leading to heap memory corruption, denial of service (crash), and arbitrary code execution.