Description
A heap buffer overflow vulnerability exists in the Netwide Assembler (NASM) due to a lack of bounds checking in the obj_directive() function. This vulnerability can be exploited by a user assembling a malicious .asm file, potentially leading to heap memory corruption, denial of service (crash), and arbitrary code execution.
References (1)
Scores
CVSS v3
5.5
EPSS
0.0004
EPSS Percentile
10.8%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-787
Status
published
Products (2)
NASM/NASM
nasm-3.02rc5
nasm/netwide_assembler
3.02 rc5
Published
Apr 10, 2026
Tracked Since
Apr 10, 2026