RHSA-2026:2583 — Security Advisory

An update for kernel-rt is now available for Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

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: RDMA/core: Fix "KASAN: slab-use-after-free Read in ib_register_device" problem (CVE-2025-38022)

• kernel: smb: client: Fix use-after-free in cifs_fill_dirent (CVE-2025-38051)

• kernel: Bluetooth: hci_event: call disconnect callback before deleting conn (CVE-2023-53673)

• kernel: drm/sched: Fix potential double free in drm_sched_job_add_resv_dependencies (CVE-2025-40096)

• kernel: mptcp: fix race condition in mptcp_schedule_work() (CVE-2025-40258)

• kernel: devlink: rate: Unset parent pointer in devl_rate_nodes_destroy (CVE-2025-40251)

• kernel: Linux kernel: Out-of-bounds write in fbdev can lead to privilege escalation, information disclosure, or denial of service. (CVE-2025-40304)

• kernel: Linux kernel: Information disclosure and denial of service via out-of-bounds read in font glyph handling (CVE-2025-40322)

• kernel: drm/i915: Fix NULL ptr deref by checking new_crtc_state (CVE-2023-53833)

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.