Critical: kernel security update (Oracle Linux 8)

[4.18.0-553.182.1]
- 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 <= 15.3-1.0.3
- Remove upstream reference during boot (Kevin Lyons) [Orabug: 34750652]
- Add new Oracle Linux Driver Signing (key 1) certificate [Orabug: 37985772]

[4.18.0-553.182.1]
- ipv4: free inet_opt and ireq_opt after an RCU grace period (Davide Caratti) [RHEL-295615] {CVE-2026-98432}

[4.18.0-553.181.1]
- net: skbuff: propagate shared-frag marker in skb_zerocopy() (Xin Long) [RHEL-291583]
- smb: client: bound dirent name against end of SMB response in cifs_filldir (Jorge San Emeterio Villalain) [RHEL-278321] {CVE-2026-93787}
- scsi: target: core: Fix iSCSI ISID use-after-free in REGISTER AND MOVE (CKI Backport Bot) [RHEL-283491] {CVE-2026-72083}
- tipc: require net admin for TIPCv2 netlink mutators (CKI Backport Bot) [RHEL-273171] {CVE-2026-74283}
- ipv6: exthdrs: refresh nh pointer after ipv6_hop_jumbo() (Antoine Tenart) [RHEL-259350] {CVE-2026-63924}
- ipv6: exthdrs: refresh nh after handling HAO option (Antoine Tenart) [RHEL-259375] {CVE-2026-63922}
- af_unix: Fix peek then tail dereference UAF in unix_stream_data_wait() (Jamie Bainbridge) [RHEL-225873] {CVE-2026-64109}