CVE-2026-6067

EUVD-2026-21378
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.5 MEDIUM
LOCAL
LOW
NONE
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 4%
Affected Products (NVD)
VendorProductVersion
nasmnetwide_assembler
3.02:rc5
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
nasm
bookworm
postponed
bullseye
postponed
forky
vulnerable
sid
vulnerable
trixie
postponed
Common Weakness Enumeration
References
https://github.com/netwide-assembler/nasm/issues/203