[El-errata] ELSA-2026-27811 Important: Oracle Linux 8 kernel security update

[Errata Announcements for Oracle Linux]

Oracle Linux Security Advisory ELSA-2026-27811

http://linux.oracle.com/errata/ELSA-2026-27811.html

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

x86_64:
bpftool-4.18.0-553.137.1.el8_10.x86_64.rpm
kernel-4.18.0-553.137.1.el8_10.x86_64.rpm
kernel-abi-stablelists-4.18.0-553.137.1.el8_10.noarch.rpm
kernel-core-4.18.0-553.137.1.el8_10.x86_64.rpm
kernel-cross-headers-4.18.0-553.137.1.el8_10.x86_64.rpm
kernel-debug-4.18.0-553.137.1.el8_10.x86_64.rpm
kernel-debug-core-4.18.0-553.137.1.el8_10.x86_64.rpm
kernel-debug-devel-4.18.0-553.137.1.el8_10.x86_64.rpm
kernel-debug-modules-4.18.0-553.137.1.el8_10.x86_64.rpm
kernel-debug-modules-extra-4.18.0-553.137.1.el8_10.x86_64.rpm
kernel-devel-4.18.0-553.137.1.el8_10.x86_64.rpm
kernel-doc-4.18.0-553.137.1.el8_10.noarch.rpm
kernel-headers-4.18.0-553.137.1.el8_10.x86_64.rpm
kernel-modules-4.18.0-553.137.1.el8_10.x86_64.rpm
kernel-modules-extra-4.18.0-553.137.1.el8_10.x86_64.rpm
kernel-tools-4.18.0-553.137.1.el8_10.x86_64.rpm
kernel-tools-libs-4.18.0-553.137.1.el8_10.x86_64.rpm
kernel-tools-libs-devel-4.18.0-553.137.1.el8_10.x86_64.rpm
perf-4.18.0-553.137.1.el8_10.x86_64.rpm
python3-perf-4.18.0-553.137.1.el8_10.x86_64.rpm

aarch64:
bpftool-4.18.0-553.137.1.el8_10.aarch64.rpm
kernel-cross-headers-4.18.0-553.137.1.el8_10.aarch64.rpm
kernel-headers-4.18.0-553.137.1.el8_10.aarch64.rpm
kernel-tools-4.18.0-553.137.1.el8_10.aarch64.rpm
kernel-tools-libs-4.18.0-553.137.1.el8_10.aarch64.rpm
kernel-tools-libs-devel-4.18.0-553.137.1.el8_10.aarch64.rpm
perf-4.18.0-553.137.1.el8_10.aarch64.rpm
python3-perf-4.18.0-553.137.1.el8_10.aarch64.rpm


SRPMS:
http://oss.oracle.com/ol8/SRPMS-updates/kernel-4.18.0-553.137.1.el8_10.src.rpm

Related CVEs:

CVE-2026-46054




Description of changes:

[4.18.0-553.137.1]
- 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]
- 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]

[4.18.0-553.137.1]
- selinux: RHEL-only hotfix for execmem regression (Ondrej Mosnacek) [RHEL-179435] {CVE-2026-46054}
- selinux: fix overlayfs mmap() and mprotect() access checks (Ondrej Mosnacek) [RHEL-179435] {CVE-2026-46054}
- lsm: add backing_file LSM hooks (Ondrej Mosnacek) [RHEL-179435] {CVE-2026-46054}
- fs: prepare for adding LSM blob to backing_file (Ondrej Mosnacek) [RHEL-179435] {CVE-2026-46054}
- perf/core: Fix MMAP event path names with backing files (Ondrej Mosnacek) [RHEL-179435]
- fs: constify file ptr in backing_file accessor helpers (Ondrej Mosnacek) [RHEL-179435] {CVE-2026-46054}
- ovl: Fix nested backing file paths (Ondrej Mosnacek) [RHEL-179435]
- fs: store real path instead of fake path in backing file f_path (Ondrej Mosnacek) [RHEL-179435]
- fs: create helper file_user_path() for user displayed mapped file path (Ondrej Mosnacek) [RHEL-179435]
- fs: get mnt_writers count for an open backing file's real path (Ondrej Mosnacek) [RHEL-179435]
- fs: move cleanup from init_file() into its callers (Ondrej Mosnacek) [RHEL-179435]
- fs: use backing_file container for internal files with "fake" f_path (Ondrej Mosnacek) [RHEL-179435]
- fs: move kmem_cache_zalloc() into alloc_empty_file*() helpers (Ondrej Mosnacek) [RHEL-179435]
- ovl: pass layer mnt to ovl_open_realfile() (Ondrej Mosnacek) [RHEL-179435]