netfilter: nft_ct: add seqadj extension for natted connections

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

CVE-2025-68206 · Microsoft / collected KEV context

cve-program · CVE-2025-68206

• https://git.kernel.org/stable/c/83273af0b60c093ba0085c205864d8542e1b1653
• https://git.kernel.org/stable/c/b19492c25eff04852e0cb58f9bb8238b6695ed2d
• https://git.kernel.org/stable/c/4de80f0dc3868408dd7fe9817e507123c9dd8bb0
• https://git.kernel.org/stable/c/b477ef7fa612fa45b6b3134d90d1eeb09396500a
• https://git.kernel.org/stable/c/4ab2cd906e4e1a19ddbda6eb532851b0e9cda110
• https://git.kernel.org/stable/c/2b52d89cbbb0dbe3e948d8d9a91e704316dccfe6
• https://git.kernel.org/stable/c/90918e3b6404c2a37837b8f11692471b4c512de2

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