Vulnerability · Published Aug 11, 2025 · Assigned by VulDB

CVE-2025-8845NASM Netwide Assember nasm.c assemble_file stack-based overflow

Medium 5.3

In plain English

A medium-severity stack 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 24% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.3%top 76.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A vulnerability was identified in NASM Netwide Assember 2.17rc0. This issue affects the function assemble_file of the file nasm.c. The manipulation leads to stack-based buffer overflow. It is possible to launch the attack on the local host. The exploit has been disclosed to the public and may be used.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	nasm	no fix listed	DEBIAN-CVE-2025-8845
Debian:13	nasm	no fix listed	DEBIAN-CVE-2025-8845
Debian:14	nasm	no fix listed	DEBIAN-CVE-2025-8845
Ubuntu:25.10	nasm	no fix listed	UBUNTU-CVE-2025-8845
Ubuntu:26.04:LTS	nasm	no fix listed	UBUNTU-CVE-2025-8845
Ubuntu:26.10	nasm	no fix listed	UBUNTU-CVE-2025-8845

Affected products (as reported)

Vendor	Product	Versions
NASM	Netwide Assember	2.17rc0

Weakness: CWE-121, 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

VDB-319379 | NASM Netwide Assember nasm.c assemble_file stack-based overflow vdb-entry, technical-description
VDB-319379 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
Submit #623188 | nasm NASM version 2.17rc0 compiled on Jul 20 2025 and the newest master (888d9ab) Memory Corruption third-party-advisory
https://bugzilla.nasm.us/show_bug.cgi?id=3392937 issue-tracking
https://drive.google.com/file/d/1pEQb6lcdohWV53DzPPU7kaCCNg-qAaau/view?usp=drive_link exploit