RHSA-2026:66000 — Security Advisory

Red Hat Security Advisory: kernel security update

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Severity

Important

Red Hat Product Security

RHEL 8

Products

Official CSAF product identity

Published · September 10, 2026

Updated · November 4, 2026

Topic

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

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: crypto: pcrypt - Fix handling of MAY_BACKLOG requests (CVE-2026-43493)
kernel: netfilter: conntrack: remove sprintf usage (CVE-2026-53002)
kernel: netfilter: synproxy: refresh tcphdr after skb_ensure_writable (CVE-2026-64007)
kernel: rhashtable: clear stale iter->p on table restart (CVE-2026-64563)
kernel: smb: client: validate DFS referral PathConsumed (CVE-2026-68343)
kernel: nvmet-rdma: handle inline data with a nonzero offset (CVE-2026-72129)
kernel: net: bridge: stop fast-leave after deleting a port group (CVE-2026-74480)

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.