CVE-2026-6067

5.5 mediumEPSS 0.4%

Medium (5.5) in nasm netwide assembler. EPSS 0.4% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

5.5 medium

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS: 0.4% chance of exploitation in the next 30 days; higher than 29% of CVEs (scores of 2026-10-31)
CWE: CWE-787
Published: 2026-04-10
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

nasm:netwide_assembler

References

https://github.com/netwide-assembler/nasm/issues/203

Check your stack JSON