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 e…
Vulnerability class: Buffer Overflow
EPSS: 0.001 (20.0th 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
- VDB-319377 | NASM Netwide Assember outmacho.c macho_no_dead_strip heap-based overflow (technical-description, Third Party Advisory, VDB Entry, vdb-entry)
- VDB-319377 | CTI Indicators (IOB, IOC, IOA) (signature, Permissions Required, permissions-required, VDB Entry)
- Submit #623185 | nasm NASM version 2.17rc0 compiled on Jul 20 2025 and the newest master (888d9ab) Memory Corruption (Exploit, Third Party Advisory, VDB Entry, third-party-advisory)
- Submit #623186 | nasm NASM version 2.17rc0 compiled on Jul 20 2025 and the newest master (888d9ab) Memory Corruption (Duplicate) (Exploit, Third Party Advisory, VDB Entry, 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.