[El-errata] ELSA-2025-20559 Important: Oracle Linux 9 Unbreakable Enterprise kernel security update

[Errata Announcements for Oracle Linux]

Oracle Linux Security Advisory ELSA-2025-20559

http://linux.oracle.com/errata/ELSA-2025-20559.html

The following updated rpms for Oracle Linux 9 have been uploaded to the Unbreakable Linux Network:

x86_64:
bpftool-5.15.0-312.187.5.1.el9uek.x86_64.rpm
kernel-uek-5.15.0-312.187.5.1.el9uek.x86_64.rpm
kernel-uek-core-5.15.0-312.187.5.1.el9uek.x86_64.rpm
kernel-uek-debug-5.15.0-312.187.5.1.el9uek.x86_64.rpm
kernel-uek-debug-core-5.15.0-312.187.5.1.el9uek.x86_64.rpm
kernel-uek-debug-devel-5.15.0-312.187.5.1.el9uek.x86_64.rpm
kernel-uek-debug-modules-5.15.0-312.187.5.1.el9uek.x86_64.rpm
kernel-uek-debug-modules-extra-5.15.0-312.187.5.1.el9uek.x86_64.rpm
kernel-uek-devel-5.15.0-312.187.5.1.el9uek.x86_64.rpm
kernel-uek-doc-5.15.0-312.187.5.1.el9uek.noarch.rpm
kernel-uek-modules-5.15.0-312.187.5.1.el9uek.x86_64.rpm
kernel-uek-modules-extra-5.15.0-312.187.5.1.el9uek.x86_64.rpm
kernel-uek-container-5.15.0-312.187.5.1.el9uek.x86_64.rpm
kernel-uek-container-debug-5.15.0-312.187.5.1.el9uek.x86_64.rpm



SRPMS:
http://oss.oracle.com/ol9/SRPMS-updates/kernel-uek-5.15.0-312.187.5.1.el9uek.src.rpm



Description of changes:

[5.15.0-312.187.5.1.el9uek]
- x86/vmscape: Warn when STIBP is disabled with SMT (Pawan Gupta)  [Orabug: 38343660]
- x86/bugs: Move cpu_bugs_smt_update() down (Pawan Gupta)  [Orabug: 38343660]
- x86/vmscape: Enable the mitigation (Pawan Gupta)  [Orabug: 38343660]
- x86/vmscape: Add conditional IBPB mitigation (Pawan Gupta)  [Orabug: 38343660]
- x86/bugs: Fix RSB clearing in indirect_branch_prediction_barrier() (Josh Poimboeuf)  [Orabug: 38343660]
- x86/vmscape: Add old Intel CPUs to affected list (Pawan Gupta)  [Orabug: 38343660]
- x86/vmscape: Enumerate VMSCAPE bug (Pawan Gupta)  [Orabug: 38343660]
- Documentation/hw-vuln: Add VMSCAPE documentation (Pawan Gupta)  [Orabug: 38343660]