net/handshake: Take a long-lived file reference at submit

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

CVE-2026-64523 · Microsoft / collected KEV context

cve-program · CVE-2026-64523

• https://git.kernel.org/stable/c/22e371a93563c30ebebc576db049785e0d7fc617
• https://git.kernel.org/stable/c/685b10dd0e32c7782cead16c8cf055c609678583
• https://git.kernel.org/stable/c/b913801ad9b9a51437d84d030ec6843e08976bd6
• https://git.kernel.org/stable/c/16eaba5aa89c04eea125905bb8f988c1897f4f29
• https://git.kernel.org/stable/c/09dba37eee70d0596e26645015f1aa95a9848e9d

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