Important: kernel security, bug fix, and enhancement update (Oracle Linux 9)

[5.14.0-687.38.1]
- 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]

[5.14.0-687.38.1]
- cifs: fix time_last_write stamp placement in setattr/truncate paths (Paulo Alcantara) [RHEL-192999]
- cifs: consolidate time_last_write stamp into _cifsFileInfo_put() (Paulo Alcantara) [RHEL-192999]
- cifs: fix cifsFileInfo leak on kmalloc failure in deferred close drain paths (Paulo Alcantara) [RHEL-192999]
- cifs: prevent readdir from changing file size due to stale directory metadata (Paulo Alcantara) [RHEL-192999]
- smb: client: fix dir separator in SMB1 UNIX mounts (Paulo Alcantara) [RHEL-192999]
- smb: client: fix sbflags initialization (Paulo Alcantara) [RHEL-192999]
- smb: client: use atomic_t for mnt_cifs_flags (Paulo Alcantara) [RHEL-192999]
- mm/slab: do not limit zeroing to orig_size when only red zoning is enabled (Rafael Aquini) [RHEL-223404] {CVE-2026-64368}

[5.14.0-687.37.1]
- s390/pkey: Check length in pkey_pckmo handler implementation (Ramesh Chhetri) [RHEL-215578]
- s390/pkey: Check length in PKEY_VERIFYPROTK ioctl (Ramesh Chhetri) [RHEL-215580]
- net: openvswitch: reject oversized nested action attrs (CKI Backport Bot) [RHEL-222495] {CVE-2026-64531}
- cxl/port: Fix use after free of parent_port in cxl_detach_ep() (Myron Stowe) [RHEL-180691] {CVE-2026-31530}
- net/mlx5: Fix slab-out-of-bounds in mlx5_query_nic_vport_mac_list (CKI Backport Bot) [RHEL-213036]
- x86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache (Dennis Chen) [RHEL-188790] {CVE-2025-54518}