RHSA-2025:19932 — Security Advisory
Red Hat Security Advisory: kernel-rt security update
Severity
ModerateRed Hat Product Security
Products
Official CSAF product identity
Published · November 10, 2025
Updated · November 2, 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 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: x86/vmscape: Add conditional IBPB mitigation (CVE-2025-40300)
-
kernel: mm: fix zswap writeback race condition (CVE-2023-53178)
-
kernel: fs: fix UAF/GPF bug in nilfs_mdt_destroy (CVE-2022-50367)
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.