Black & White Path

Jun 5, 2026 · Information Security

How a Single IPv6 Packet Crashes Comodo’s Firewall Driver (ComoDoS)

Security researcher Marcus Hutchins discovered a zero‑day integer underflow in Comodo Internet Security’s Inspect.sys firewall driver that can be triggered remotely via a crafted IPv6 packet, causing a Windows kernel blue‑screen; the analysis details the vulnerability, PoC, limitations for RCE, and mitigation recommendations.