net/packet: avoid fanout hook re-registration after unregister

These records connect through source-stated identifiers. Shared identifiers or dates alone do not establish shared exposure, root cause or applicability.

CVE-2026-68338 · Microsoft / collected KEV context

cve-program · CVE-2026-68338

• https://git.kernel.org/stable/c/acb40ebfa5c4d62f84339fcbf713f2a9fd033a71
• https://git.kernel.org/stable/c/c820f4b7f2fa38f8769db0d0cefdd94e2721504d
• https://git.kernel.org/stable/c/4628efbdc7affd094181f5263e65c1062e31f15f
• https://git.kernel.org/stable/c/80ec024d53a05c60ad1d08968dcf745f10c1665c
• https://git.kernel.org/stable/c/0a052e0808e015e68144a9877e6ef42b952c49fa
• https://git.kernel.org/stable/c/1bc55c29cd85818e9052f17deb287d5a11fb817f
• https://git.kernel.org/stable/c/a885387dae7986a55bae5c77a15bdd447f64e9b9
• https://git.kernel.org/stable/c/50aff80475abd3533eef4320477037e6fcc6b56e

No related operational record is retained in the current change model.