RHSA-2026:77500 — Security Advisory
Red Hat Security Advisory: kernel-rt security update
Severity
ImportantRed Hat Product Security
Products
Official CSAF product identity
Published · October 7, 2026
Updated · November 3, 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: vsock/vmci: fix UAF when peer resets connection during handshake (CVE-2026-64115)
-
kernel: packet: use consistent hard_header_len in non-ring send paths ()
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kernel: packet: use consistent hard_header_len in non-ring send paths (CVE-2026-74582)
-
kernel: svcrdma: Reject inline replies that overflow the pull-up buffer (CVE-2026-89530)
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.