RHSA-2025:9581 — Security Advisory

An update for kernel-rt is now available for Red Hat Enterprise Linux 8.

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: cifs: fix double free race when mount fails in cifs_get_root() (CVE-2022-48919)

• kernel: security/keys: fix slab-out-of-bounds in key_task_permission (CVE-2024-50301)

• kernel: idpf: fix idpf_vc_core_init error path (CVE-2024-53064)

• kernel: ndisc: use RCU protection in ndisc_alloc_skb() (CVE-2025-21764)

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.