Important: kernel update (Oracle Linux 9)

[5.14.0-687.23.1]
- Disable UKI signing [Orabug: 36571828]
- Update Oracle Linux certificates (Kevin Lyons)
- Disable signing for aarch64 (Ilya Okomin)
- Oracle Linux RHCK Module Signing Key was added to the kernel trusted keys list (olkmod_signing_key.pem) [Orabug: 29539237]
- Update x509.genkey [Orabug: 24817676]
- Conflict with shim-ia32 and shim-x64 <= 15.3-1.0.5]
- Remove upstream reference during boot (Kevin Lyons) [Orabug: 34729535]
- Add Oracle Linux IMA certificates
- Add new Oracle Linux Driver Signing (key 1) certificate [Orabug: 37985764]

[5.14.0-687.23.1]
- eventpoll: refresh epi_fget() / ep_remove_file() comments (Ian Kent) [RHEL-180773]
- eventpoll: Fix integer overflow in ep_loop_check_proc() (Ian Kent) [RHEL-180773]
- eventpoll: drop vestigial epi->dying flag (Ian Kent) [RHEL-180773]
- eventpoll: drop dead bool return from ep_remove_epi() (Ian Kent) [RHEL-180773]
- eventpoll: refresh eventpoll_release() fast-path comment (Ian Kent) [RHEL-180773]
- eventpoll: move f_lock acquisition into ep_remove_file() (Ian Kent) [RHEL-180773]
- eventpoll: fix ep_remove struct eventpoll / struct file UAF (Ian Kent) [RHEL-180773] {CVE-2026-46242}
- eventpoll: drop vestigial __ prefix from ep_remove_{file,epi}() (Ian Kent) [RHEL-180773]
- eventpoll: move epi_fget() up (Ian Kent) [RHEL-180773]
- eventpoll: rename ep_remove_safe() back to ep_remove() (Ian Kent) [RHEL-180773]
- eventpoll: kill __ep_remove() (Ian Kent) [RHEL-180773]
- eventpoll: split __ep_remove() (Ian Kent) [RHEL-180773]
- eventpoll: use hlist_is_singular_node() in __ep_remove() (Ian Kent) [RHEL-180773]
- eventpoll: defer struct eventpoll free to RCU grace period (Ian Kent) [RHEL-173830] {CVE-2026-43074}
- epoll: annotate racy check (Ian Kent) [RHEL-180773]
- netfilter: bridge: make ebt_snat ARP rewrite writable (CKI Backport Bot) [RHEL-182344]
- tg3: Fix race for querying speed/duplex (CKI Backport Bot) [RHEL-182768]