RHSA-2026:64770 — Security Advisory

Red Hat Security Advisory: kernel-rt security update

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Severity

Important

Red Hat Product Security

RHEL 8

Products

Official CSAF product identity

Published · September 8, 2026

Updated · November 4, 2026

Topic

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 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-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

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.