RHSA-2026:83159 — 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 · October 15, 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: Linux kernel: Denial of Service due to use-after-free in act_tunnel_key (CVE-2026-68377)
kernel: ASoC: SOF: ipc3-control: Fix heap overflow in bytes_ext put/get (CVE-2026-72262)
kernel: net/sched: cls_route: fix fastmap use-after-free on filter (CVE-2026-74583)
kernel: ALSA: usx2y: bound the hwdep mmap fault offset (CVE-2026-74641)
kernel: udp: fix potential use-after-free in tunnel segmentation (CVE-2026-74705)
kernel: svcrdma: Validate Read chunk positions before reconstruction (CVE-2026-89526)
kernel: NFSD: Prevent client use-after-free during blocked-lock reaping (CVE-2026-90036)
kernel: svcrdma: Reject Write/Reply chunks with segcount 0 (CVE-2026-93228)
kernel: md/raid5-ppl: fix use-after-free in ppl_do_flush() (CVE-2026-93262)

Bug Fix(es) and Enhancement(s):

powerpc/pseries: pci - logic bug in SR-IOV enable (JIRA:RHEL-240146)

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.