[El-errata] ELSA-2026-23258 Important: Oracle Linux 8 kernel security update

[Errata Announcements for Oracle Linux]

Oracle Linux Security Advisory ELSA-2026-23258

http://linux.oracle.com/errata/ELSA-2026-23258.html

The following updated rpms for Oracle Linux 8 have been uploaded to the Unbreakable Linux Network:

x86_64:
bpftool-4.18.0-553.129.1.el8_10.x86_64.rpm
kernel-4.18.0-553.129.1.el8_10.x86_64.rpm
kernel-abi-stablelists-4.18.0-553.129.1.el8_10.noarch.rpm
kernel-core-4.18.0-553.129.1.el8_10.x86_64.rpm
kernel-cross-headers-4.18.0-553.129.1.el8_10.x86_64.rpm
kernel-debug-4.18.0-553.129.1.el8_10.x86_64.rpm
kernel-debug-core-4.18.0-553.129.1.el8_10.x86_64.rpm
kernel-debug-devel-4.18.0-553.129.1.el8_10.x86_64.rpm
kernel-debug-modules-4.18.0-553.129.1.el8_10.x86_64.rpm
kernel-debug-modules-extra-4.18.0-553.129.1.el8_10.x86_64.rpm
kernel-devel-4.18.0-553.129.1.el8_10.x86_64.rpm
kernel-doc-4.18.0-553.129.1.el8_10.noarch.rpm
kernel-headers-4.18.0-553.129.1.el8_10.x86_64.rpm
kernel-modules-4.18.0-553.129.1.el8_10.x86_64.rpm
kernel-modules-extra-4.18.0-553.129.1.el8_10.x86_64.rpm
kernel-tools-4.18.0-553.129.1.el8_10.x86_64.rpm
kernel-tools-libs-4.18.0-553.129.1.el8_10.x86_64.rpm
kernel-tools-libs-devel-4.18.0-553.129.1.el8_10.x86_64.rpm
perf-4.18.0-553.129.1.el8_10.x86_64.rpm
python3-perf-4.18.0-553.129.1.el8_10.x86_64.rpm

aarch64:
bpftool-4.18.0-553.129.1.el8_10.aarch64.rpm
kernel-cross-headers-4.18.0-553.129.1.el8_10.aarch64.rpm
kernel-headers-4.18.0-553.129.1.el8_10.aarch64.rpm
kernel-tools-4.18.0-553.129.1.el8_10.aarch64.rpm
kernel-tools-libs-4.18.0-553.129.1.el8_10.aarch64.rpm
kernel-tools-libs-devel-4.18.0-553.129.1.el8_10.aarch64.rpm
perf-4.18.0-553.129.1.el8_10.aarch64.rpm
python3-perf-4.18.0-553.129.1.el8_10.aarch64.rpm


SRPMS:
http://oss.oracle.com/ol8/SRPMS-updates/kernel-4.18.0-553.129.1.el8_10.src.rpm

Related CVEs:

CVE-2026-46243




Description of changes:

[4.18.0-553.129.1]
- 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]

[4.18.0-553.129.1]
- smb: client: reject userspace cifs.spnego descriptions (Paulo Alcantara) [RHEL-178938] {CVE-2026-46243}

[4.18.0-553.128.1]
- smb: client: fix OOB reads parsing symlink error response (Paulo Alcantara) [RHEL-171465] {CVE-2026-31613}
- geneve: Suppress list corruption splat in geneve_destroy_tunnels(). (Antoine Tenart) [RHEL-168961]
- geneve: Fix use-after-free in geneve_find_dev(). (Antoine Tenart) [RHEL-168961] {CVE-2025-21858}
- netfilter: nf_tables: release flowtable after rcu grace period on error (Florian Westphal) [RHEL-160514] {CVE-2026-23392}

[4.18.0-553.127.1]
- smc: Fix use-after-free in tcp_write_timer_handler(). (Steve Best) [RHEL-167084] {CVE-2023-53781}
- nbd: defer config unlock in nbd_genl_connect (CKI Backport Bot) [RHEL-166939] {CVE-2025-68366}
- libceph: prevent potential out-of-bounds reads in handle_auth_done() (CKI Backport Bot) [RHEL-143892] {CVE-2026-22984}
- libceph: replace overzealous BUG_ON in osdmap_apply_incremental() (CKI Backport Bot) [RHEL-143874] {CVE-2026-22990}