GO-2026-6237

    Dashboard / Vulnerabilities / GO-2026-6237

    GO-2026-6237

    Published: 18 Aug 2026Last Modified: 19 Aug 2026

    Summary: Denial of service via malformed IPv4 packet in github.com/insomniacslk/dhcp

    Details: In github.com/insomniacslk/dhcp/dhcpv4/nclient4, BroadcastRawUDPConn.ReadFrom does not validate that the IPv4 payload length is sufficient to hold a UDP header before calculating the DHCP payload length. A frame with an IPv4 total-length field specifying fewer than eight payload bytes results in a negative DHCP length, causing a panic in buf.Consume due to a negative slice bound.

    References: https://github.com/insomniacslk/dhcp/commit/c76316d4aa825673b208730779843d0711021e81

    Affected packages

    Package

    Name: github.com/insomniacslk/dhcp

    Purl: pkg:golang/github.com/insomniacslk/dhcp

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 0
    Fixed -0.0.0-20260719225207-c76316d4aa82

    Affected versions

    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