RHSA-2026:36348 — Security Advisory

Red Hat Security Advisory: kernel-rt security, bug fix, and enhancement update

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Severity

Important

Red Hat Product Security

RHEL 8

Products

Official CSAF product identity

Published · July 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: tcp: fix potential race in tcp_v6_syn_recv_sock() (CVE-2026-43198)
kernel: netfilter: nfnetlink_cthelper: fix OOB read in nfnl_cthelper_dump_table() (CVE-2026-43450)
kernel: sctp: revalidate list cursor after sctp_sendmsg_to_asoc() in SCTP_SENDALL (CVE-2026-46227)
kernel: drm/gem: Fix inconsistent plane dimension calculation in drm_gem_fb_init_with_funcs() (CVE-2026-46209)
kernel: procfs: fix missing RCU protection when reading real_parent in do_task_stat() (CVE-2026-46259)
kernel: Arm Processors: Privilege escalation or information disclosure via writes to higher exception level resources (CVE-2025-10263)

Bug Fix(es) and Enhancement(s):

kernel panic at trailing_symlink while the task wdavdaemon runs even after 4c4f7c19b3c7 (JIRA:RHEL-152759)

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.