arp packet mangling

ARP packet mangling refers to the manipulation of Address Resolution Protocol packets, often by network filtering tools like arptables. On WindowsForum.com, discussions cover kernel-level bugs such as CVE-2026-45844, where Linux arptables mishandles IPv4-over-IEEE1394 ARP packets, leading to incorrect rule matching and potentially unsafe packet mangling on FireWire interfaces. While the practical impact of this specific flaw is narrow, it highlights how brittle network filtering can become when old assumptions outlive the hardware they were designed for. The tag is relevant to enterprise IT and security professionals concerned with obscure kernel edge cases that expose vulnerabilities in firewall logic.