RHSA-2026:93437 — 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 · November 2, 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: ipv6: exthdrs: refresh nh pointer after ipv6_hop_jumbo() (CVE-2026-63924)
kernel: ipv6: exthdrs: refresh nh after handling HAO option (CVE-2026-63922)
kernel: af_unix: Fix UAF read of tail->len in unix_stream_data_wait() (CVE-2026-64109)
kernel: scsi: target: core: Fix iSCSI ISID use-after-free in REGISTER AND MOVE (CVE-2026-72083)
kernel: tipc: require net admin for TIPCv2 netlink mutators (CVE-2026-74283)
kernel: smb: client: bound dirent name against end of SMB response in cifs_filldir (CVE-2026-93787)
kernel: ZDI-CAN-33367: Linux Kernel skbuff skb_zerocopy Improper Ownership Management Local Privilege Escalation Vulnerability ()

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.