netfilter: ctnetlink: ensure safe access to master conntrack

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

CVE-2026-43116 · Microsoft / collected KEV context

cve-program · CVE-2026-43116

• https://git.kernel.org/stable/c/9e1196d27ef496f404c76f7a9d03761142d991c4
• https://git.kernel.org/stable/c/5e1c1d22268ae710c238342c8030c21daf298168
• https://git.kernel.org/stable/c/d52fa1fa7440676b8c238037a050ab008c22737f
• https://git.kernel.org/stable/c/f338ced0473849c9f6ed0b77ca99f1aab5826787
• https://git.kernel.org/stable/c/497f99b26fffdc5635706d1b4811f1ed8ee21a5b
• https://git.kernel.org/stable/c/bffcaad9afdfe45d7fc777397d3b83c1e3ebffe5

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