Important: kernel-rt security update

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fix(es): * kernel: net/sched: Always pass notifications when child class becomes empty (CVE-2025-38350) * kernel: idpf: convert control queue mutex to a spinlock (CVE-2025-38392) * kernel: drm/gem: Acquire references on GEM handles for framebuffers (CVE-2025-38449) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.