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Vulnerability · Published Aug 11, 2025 · Assigned by VulDB

CVE-2025-8843NASM Netwide Assember outmacho.c macho_no_dead_strip heap-based overflow

Medium 5.3

In plain English

A medium-severity heap buffer overflow in Netwide Assember from NASM. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.3%top 77.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12nasmno fix listedDEBIAN-CVE-2025-8843
Debian:13nasmno fix listedDEBIAN-CVE-2025-8843
Debian:14nasmno fix listedDEBIAN-CVE-2025-8843
Ubuntu:25.10nasmno fix listedUBUNTU-CVE-2025-8843
Ubuntu:26.04:LTSnasmno fix listedUBUNTU-CVE-2025-8843
Ubuntu:26.10nasmno fix listedUBUNTU-CVE-2025-8843

Affected products (as reported)

VendorProductVersions
NASM Netwide Assember 2.17rc0

Weakness: CWE-122, CWE-119 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

References