RHSA-2026:1879 — Security Advisory

Red Hat Security Advisory: kernel security update

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Severity

Important

Red Hat Product Security

RHEL 9

Products

Official CSAF product identity

Published · February 5, 2026

Updated · October 30, 2026

Topic

An update for kernel is now available for Red Hat Enterprise Linux 9.4 Extended Update Support.

Red Hat Product Security has rated this update as having a security impact of Important. 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.

Description

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

kernel: smb: client: Fix use-after-free in cifs_fill_dirent (CVE-2025-38051)
kernel: drm/sched: Fix potential double free in drm_sched_job_add_resv_dependencies (CVE-2025-40096)
kernel: Linux kernel: vsock vulnerability may lead to memory corruption (CVE-2025-40248)
kernel: devlink: rate: Unset parent pointer in devl_rate_nodes_destroy (CVE-2025-40251)
kernel: net: atlantic: fix fragment overflow handling in RX path (CVE-2025-68301)

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.