Vulnerability · Published Apr 10, 2026 · Assigned by certcc
CVE-2026-6067CVE-2026-6067
High 7.5
In plain English
A high-severity security flaw in NASM from NASM. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities).
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.4%top 70.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | nasm | no fix listed | DEBIAN-CVE-2026-6067 |
| Debian:13 | nasm | no fix listed | DEBIAN-CVE-2026-6067 |
| Debian:14 | nasm | no fix listed | DEBIAN-CVE-2026-6067 |
| Ubuntu:25.10 | nasm | no fix listed | UBUNTU-CVE-2026-6067 |
| Ubuntu:26.04:LTS | nasm | no fix listed | UBUNTU-CVE-2026-6067 |
| Ubuntu:26.10 | nasm | no fix listed | UBUNTU-CVE-2026-6067 |