vt: stabilize tty reference in kbd_keycode with tty_port_tty_get

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

CVE-2026-74675 · Microsoft / collected KEV context

cve-program · CVE-2026-74675

• https://git.kernel.org/stable/c/b84fd400f80adf4d1c88fbce50ae1cf2f8119e65
• https://git.kernel.org/stable/c/38400673c9bfb39cfc87539e1a072087e98f4e4f
• https://git.kernel.org/stable/c/cab5a342f0589334046741006d8a280514f94235
• https://git.kernel.org/stable/c/38a0aa593ebc275aea6f79534d07f44e43768ce6
• https://git.kernel.org/stable/c/3f6b1d3fcfc26dc3fc85262f753439df93b055b4
• https://git.kernel.org/stable/c/b664592e9ba8c47c9e23408db7ba52eb9f946c8a
• https://git.kernel.org/stable/c/cc4a1a2ce0c58eafd477effb055863935260ddc1
• https://git.kernel.org/stable/c/e25d47a526939ad44b75f778b8a7500562b84fc1

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