Buffer overflow in Nasm Netwide Assember
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.
Vulnerability class: Buffer Overflow
EPSS: 0.003 (16.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Nasm Netwide Assember — versions 2.17rc0
- Nasm Netwide_assembler — versions 2.17
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cna@vuldb.com (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- cna@vuldb.com (signature, Permissions Required, permissions-required, VDB Entry)
- cna@vuldb.com (Exploit, VDB Entry, Third Party Advisory, third-party-advisory)
- cna@vuldb.com (Exploit, VDB Entry, Third Party Advisory, third-party-advisory)
- cna@vuldb.com (issue-tracking, Exploit, Issue Tracking, Vendor Advisory)
- cna@vuldb.com (Exploit, exploit)
Frequently asked questions
- What is CVE-2025-8843?
- CVE-2025-8843 is a medium-severity vulnerability in Nasm Netwide Assember, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.3/10. Published 2025-08-11.
- How severe is CVE-2025-8843?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2025-8843 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.