CVE-2026-6068

EUVD-2026-21380
NASM contains a heap use after free vulnerability in response file (-@) processing where a dangling pointer to freed memory is stored in the global depend_file and later dereferenced, as the response-file buffer is freed before the pointer is used, allowing for data corruption or remote code execution.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
9.6 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 39.63%
Affected Products (NVD)
VendorProductVersion
nasmnetwide_assembler
3.02:rc5
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
nasm
bookworm
unimportant
forky
unimportant
sid
unimportant
trixie
unimportant
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
nasm
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
questing
ignored
resolute
needs-triage
xenial
needs-triage
Common Weakness Enumeration
References
https://github.com/netwide-assembler/nasm/issues/222
https://sekai.team/blog/nasm-cve-disclosure/cve-2026-6068