| Name | CVE-2026-6067 |
| 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. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1133375 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| nasm (PTS) | bullseye | 2.15.05-1 | vulnerable |
| bookworm | 2.16.01-1 | vulnerable |
| trixie | 2.16.03-1 | vulnerable |
| forky, sid | 3.01-1 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| nasm | source | (unstable) | (unfixed) | | | 1133375 |
Notes
[trixie] - nasm <postponed> (Minor issue, revisit when fixed upstream)
[bookworm] - nasm <postponed> (Minor issue, revisit when fixed upstream)
[bullseye] - nasm <postponed> (Minor issue, revisit when fixed upstream)
https://github.com/netwide-assembler/nasm/issues/203