cve 2025 61101

CVE-2025-61101 is a NULL-pointer dereference vulnerability in the FRRouting (FRR) OSPF code that can be triggered by a crafted OSPF packet, potentially crashing the ospfd process and causing a Denial of Service (DoS) for affected routing hosts and appliances. The vulnerability was disclosed in October 2025 and impacts Linux and BSD routers, network appliances, and cloud/edge environments using FRR. Discussions on WindowsForum cover patch availability, mitigation strategies, and the broader implications for network infrastructure security. Users are advised to apply vendor patches and implement OSPF packet filtering where possible.