eventpoll: fix ep_remove struct eventpoll / struct file UAF

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CVE-2026-46242 · Microsoft / collected KEV context

cve-program · CVE-2026-46242

• https://git.kernel.org/stable/c/a10fbbe74e1c743beb1bb312109366667461df8a
• https://git.kernel.org/stable/c/3e1144d2515d28e4312e663ea05eac203101491d
• https://git.kernel.org/stable/c/2de4db145b2992da496fea6c51f9839be678ae24
• https://git.kernel.org/stable/c/9324de74a3a59b9fde9b62ee45ebaa71458ba2e5
• https://git.kernel.org/stable/c/ef4ca02e95363e78977ca04340d44fe3b4b2b81f
• https://git.kernel.org/stable/c/ced39b6a8062bac5c18a1c3df85634107eb8664a
• https://git.kernel.org/stable/c/a6dc643c69311677c574a0f17a3f4d66a5f3744b

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