RHSA-2026:50978 — Security Advisory
Red Hat Security Advisory: kernel 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 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 packages contain the Linux kernel, the core of any Linux operating system.
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.