RHSA-2026:50979 — Security Advisory
Red Hat Security Advisory: kernel-rt security, bug fix, and enhancement update
Severity
ImportantRed Hat Product Security
Products
Official CSAF product identity
Published · August 6, 2026
Updated · September 12, 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: xen: AMD Zen 2 Processors: Privilege escalation via improper CPU cache isolation (CVE-2025-54518)
Bug Fix(es) and Enhancement(s):
-
Kernel crash in bpf_for_each_array_elem() due to missing backport of upstream commit 4b6313cf99b0 (JIRA:RHEL-191844)
-
gfs2: xfstests generic/363 failure [rhel-8.10.z] (JIRA:RHEL-214099)
-
RHEL8: HYPERV hv_storvsc driver can we add additional code to allow PERSISTENT_RESERVE_IN [RHEL 8.10Z] (JIRA:RHEL-188270)
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.