CVE-2025-8843: netwide assembler Buffer Overflow

Description

A vulnerability was found in NASM Netwide Assember 2.17rc0. This affects the function macho_no_dead_strip of the file outmacho.c. The manipulation leads to heap-based buffer overflow. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used.

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CVSS v3.1 Score

5.3

MEDIUM

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

Weakness Type (CWE)

CWE-119 Buffer Overflow

CWE-122 CWE-122

CWE-787 Out-of-bounds Write

Affected Products

Vendor	Product	Versions
nasm	netwide_assembler	All

References

Advisories & Patches

https://bugzilla.nasm.us/show_bug.cgi?id=3392934 https://bugzilla.nasm.us/show_bug.cgi?id=3392934

Exploits

https://bugzilla.nasm.us/show_bug.cgi?id=3392934 https://drive.google.com/file/d/1JRHWdjW6FGHDV0CMJe8VinmCQ4vP9ZpR/view?usp=drive_link https://vuldb.com/?submit.623185 https://vuldb.com/?submit.623186 https://bugzilla.nasm.us/show_bug.cgi?id=3392934 https://vuldb.com/?submit.623186

Other References

https://vuldb.com/?ctiid.319377 https://vuldb.com/?id.319377

Frequently Asked Questions

What is CVE-2025-8843? +

A vulnerability was found in NASM Netwide Assember 2.17rc0. This affects the function macho_no_dead_strip of the file outmacho.c. The manipulation leads to heap-based buffer overflow. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used. It has a CVSS v3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2025-8843? +

CVE-2025-8843 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-8843? +

CVE-2025-8843 affects products from nasm, specifically: netwide_assembler. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-8843? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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