RHSA-2025:18279 — Security Advisory

Red Hat Security Advisory: kernel-rt security update

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Severity

Moderate

Red Hat Product Security

RHEL 9

Products

Official CSAF product identity

Published · October 20, 2025

Updated · October 29, 2026

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions.

Red Hat Product Security has rated this update as having a security impact of Moderate. 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: net: usb: smsc75xx: Limit packet length to skb->len (CVE-2023-53125)

  • kernel: ipv6: mcast: Delay put pmc->idev in mld_del_delrec() (CVE-2025-38550)

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.

Related CVEs

RHSA-2025:18279 — Red Hat Security Advisory: kernel-rt security update | PulseLinux