The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - ipv4: route: Prevent rt_bind_exception() from rebinding stale fnhe The sit driver's packet transmission     path calls: sit_tunnel_xmit() -> update_or_create_fnhe(), which lead to fnhe_remove_oldest() being called     to delete entries exceeding FNHE_RECLAIM_DEPTH+random. The race window is between fnhe_remove_oldest()     selecting fnheX for deletion and the subsequent kfree_rcu(). During this time, the concurrent path's
    __mkroute_output() -> find_exception() can fetch the soon-to-be-deleted fnheX, and rt_bind_exception()     then binds it with a new dst using a dst_hold(). When the original fnheX is freed via RCU, the dst     reference remains permanently leaked. CPU 0 CPU 1 __mkroute_output() find_exception() [fnheX]     update_or_create_fnhe() fnhe_remove_oldest() [fnheX] rt_bind_exception() [bind dst] RCU callback [fnheX     freed, dst leak] This issue manifests as a device reference count leak and a warning in dmesg when     unregistering the net device: unregister_netdevice: waiting for sitX to become free. Usage count = N Ido     Schimmel provided the simple test validation method [1]. The fix clears 'oldest->fnhe_daddr' before     calling fnhe_flush_routes(). Since rt_bind_exception() checks this field, setting it to zero prevents the     stale fnhe from being reused and bound to a new dst just before it is freed. [1] ip netns add ns1 ip -n     ns1 link set dev lo up ip -n ns1 address add 192.0.2.1/32 dev lo ip -n ns1 link add name dummy1 up type     dummy ip -n ns1 route add 192.0.2.2/32 dev dummy1 ip -n ns1 link add name gretap1 up arp off type gretap \     local 192.0.2.1 remote 192.0.2.2 ip -n ns1 route add 198.51.0.0/16 dev gretap1 taskset -c 0 ip netns exec     ns1 mausezahn gretap1 \ -A 198.51.100.1 -B 198.51.0.0/16 -t udp -p 1000 -c 0 -q & taskset -c 2 ip netns     exec ns1 mausezahn gretap1 \ -A 198.51.100.1 -B 198.51.0.0/16 -t udp -p 1000 -c 0 -q & sleep 10 ip netns     pids ns1 | xargs kill ip netns del ns1 (CVE-2025-68241)

Note that Nessus relies on the presence of the package as reported by the vendor.

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Linux Distros Unpatched Vulnerability : CVE-2025-68241

medium Nessus Plugin ID 278908

Version 1.5

Version 1.4

Version 1.3

Version 1.2

Version 1.1

Version 1.5 Jan 21, 2026, 5:00 PM Detection (updated detection logic) Plugin metadata Plugin Feed: 202601211700
Version 1.4 Jan 13, 2026, 2:35 AM Detection (updated detection logic) Plugin metadata Plugin Feed: 202601130235
Version 1.3 Jan 10, 2026, 7:58 PM Detection (updated detection logic) Plugin Feed: 202601101958
Version 1.2 Dec 18, 2025, 1:27 AM CVSS metrics ("CVSSv3 score" set to 5.5) CVSS metrics ("CVSSv3 vector" set to "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H") CVSSv3 severity (based on None, severity decreased from "High" to "Medium") Detection (updated detection logic) Plugin metadata Plugin Feed: 202512180127
Version 1.1 Dec 17, 2025, 4:56 PM New Plugin Feed: 202512171656