RHSA-2026:2378 — 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: vsock/vmci: Clear the vmci transport packet properly when initializing it (CVE-2025-38403)

• kernel: net: use dst_dev_rcu() in sk_setup_caps() (CVE-2025-40170)

• kernel: ipv6: use RCU in ip6_xmit() (CVE-2025-40135)

• kernel: ipv6: use RCU in ip6_output() (CVE-2025-40158)

• kernel: Linux kernel ALSA USB audio driver: Buffer overflow leading to information disclosure and denial of service (CVE-2025-40269)

• kernel: ext4: fix use-after-free in ext4_orphan_cleanup (CVE-2022-50673)

• kernel: NFSv4/pNFS: Clear NFS_INO_LAYOUTCOMMIT in pnfs_mark_layout_stateid_invalid (CVE-2025-68349)

• kernel: nvme-tcp: fix NULL pointer dereferences in nvmet_tcp_build_pdu_iovec (CVE-2026-22998)

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.