CVE-2025-8842: netwide assembler Buffer Overflow

Description

A vulnerability has been found in NASM Netwide Assember 2.17rc0. Affected by this issue is the function do_directive of the file preproc.c. The manipulation leads to use after free. An attack has to be approached locally. 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-416 Use After Free

Affected Products

Vendor	Product	Versions
nasm	netwide_assembler	All

References

Advisories & Patches

https://bugzilla.nasm.us/show_bug.cgi?id=3392933 https://bugzilla.nasm.us/show_bug.cgi?id=3392933

Exploits

https://bugzilla.nasm.us/show_bug.cgi?id=3392933 https://drive.google.com/file/d/11vEV1vMHXO4BrDGhvWAMm0Qo1woiUwVV/view?usp=drive_link https://vuldb.com/?submit.623184 https://bugzilla.nasm.us/show_bug.cgi?id=3392933 https://vuldb.com/?submit.623184

Other References

https://vuldb.com/?ctiid.319376 https://vuldb.com/?id.319376

Frequently Asked Questions

What is CVE-2025-8842? +

A vulnerability has been found in NASM Netwide Assember 2.17rc0. Affected by this issue is the function do_directive of the file preproc.c. The manipulation leads to use after free. An attack has to be approached locally. 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-2025-8842? +

CVE-2025-8842 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-2025-8842? +

CVE-2025-8842 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-2025-8842? +

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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