CVE-2025-39980 nexthop: Forbid FDB status change while nexthop is in a group

In the Linux kernel, the following vulnerability has been resolved: nexthop: Forbid FDB status change while nexthop is in a group The kernel forbids the creation of non-FDB nexthop groups with FDB nexthops: ip nexthop add id 1 via 192.0.2.1 fdb ip nexthop add id 2 group 1 Error: Non FDB nexthop...

CVE-2025-39980

The CVE-2025-39980 issue is a Linux kernel vulnerability where changing the FDB status of a nexthop that is in a group could previously be performed, risking invalid configurations and potential non-persistent defects. The documented fix prevents changing the nexthop FDB status while it remains i...