RHSA-2026:36049 — 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 7, 2026

Updated · October 17, 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: scsi: target: iscsi: Fix use-after-free in iscsit_dec_conn_usage_count() (CVE-2026-23216)
kernel: gfs2: Fix use-after-free in iomap inline data write path (CVE-2026-45984)
kernel: RDMA/vmw_pvrdma: Fix double free on pvrdma_alloc_ucontext() error path (CVE-2026-46189)

Bug Fix(es) and Enhancement(s):

[RHEL 8.10.z] Add an .sbat section to the x86 kernel (JIRA:RHEL-182788)
Incorrect message "NFS: Server wrote zero bytes" is shown in the logs (JIRA:RHEL-147665)

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.