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    CVE-2026-6067

    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.

    Published:Apr 10, 2026
    Last Modified:Apr 23, 2026
    EPS:Apr 10, 2026
    EPSS Score:0.00064
    CVSS Score:7.5

    Affected Products

    Vendor
    Nasm
    Product
    Nasm
    Vendor
    Nasm
    Product
    Netwide Assembler

    Exploits

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

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High