- Issued:
- 2026-08-06
- Updated:
- 2026-08-06
RHSA-2026:50978 - Important: kernel security, bug fix, and enhancement update
Synopsis
Important: kernel security, bug fix, and enhancement update
Type/Severity
Security Advisory: Important
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.
Solution
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
The system must be rebooted for this update to take effect.
Red Hat recommends treating all kernel errata as security-relevant. Given the kernel's fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers' overall security posture.
Because of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat's CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.
Affected Products
| Product | Version | Arch |
|---|---|---|
| Red Hat Enterprise Linux for x86_64 | 8 | x86_64 |
| Red Hat Enterprise Linux for x86_64 - Extended Life Cycle | 8.10 | x86_64 |
| Red Hat Enterprise Linux for Power, little endian | 8 | ppc64le |
| Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle | 8.10 | ppc64le |
| Red Hat Enterprise Linux for IBM z Systems | 8 | s390x |
| Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle | 8.10 | s390x |
| Red Hat Enterprise Linux for ARM 64 | 8 | aarch64 |
| Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle | 8.10 | aarch64 |
| Red Hat CodeReady Linux Builder for x86_64 | 8 | x86_64 |
| Red Hat CodeReady Linux Builder for Power, little endian | 8 | ppc64le |
| Red Hat CodeReady Linux Builder for ARM 64 | 8 | aarch64 |
Updated Packages
- python3-perf-debuginfo-4.18.0-553.153.1.el8_10.x86_64.rpm
- kernel-debug-4.18.0-553.153.1.el8_10.aarch64.rpm
- kernel-cross-headers-4.18.0-553.153.1.el8_10.s390x.rpm
- bpftool-debuginfo-4.18.0-553.153.1.el8_10.aarch64.rpm
- python3-perf-debuginfo-4.18.0-553.153.1.el8_10.s390x.rpm
- kernel-tools-debuginfo-4.18.0-553.153.1.el8_10.ppc64le.rpm
- kernel-tools-debuginfo-4.18.0-553.153.1.el8_10.x86_64.rpm
- bpftool-4.18.0-553.153.1.el8_10.x86_64.rpm
- kernel-debug-core-4.18.0-553.153.1.el8_10.s390x.rpm
- kernel-tools-libs-4.18.0-553.153.1.el8_10.ppc64le.rpm
- kernel-tools-4.18.0-553.153.1.el8_10.s390x.rpm
- kernel-zfcpdump-devel-4.18.0-553.153.1.el8_10.s390x.rpm
- python3-perf-4.18.0-553.153.1.el8_10.x86_64.rpm
- bpftool-4.18.0-553.153.1.el8_10.ppc64le.rpm
- kernel-tools-debuginfo-4.18.0-553.153.1.el8_10.aarch64.rpm
- kernel-debug-modules-extra-4.18.0-553.153.1.el8_10.ppc64le.rpm
- kernel-debuginfo-4.18.0-553.153.1.el8_10.aarch64.rpm
- kernel-doc-4.18.0-553.153.1.el8_10.noarch.rpm
- kernel-4.18.0-553.153.1.el8_10.x86_64.rpm
- kernel-debug-4.18.0-553.153.1.el8_10.ppc64le.rpm
- bpftool-debuginfo-4.18.0-553.153.1.el8_10.s390x.rpm
- kernel-debuginfo-4.18.0-553.153.1.el8_10.x86_64.rpm
- kernel-debug-devel-4.18.0-553.153.1.el8_10.aarch64.rpm
- bpftool-debuginfo-4.18.0-553.153.1.el8_10.x86_64.rpm
- kernel-debuginfo-4.18.0-553.153.1.el8_10.ppc64le.rpm
- kernel-debuginfo-common-s390x-4.18.0-553.153.1.el8_10.s390x.rpm
- kernel-headers-4.18.0-553.153.1.el8_10.ppc64le.rpm
- kernel-cross-headers-4.18.0-553.153.1.el8_10.aarch64.rpm
- kernel-core-4.18.0-553.153.1.el8_10.x86_64.rpm
- kernel-headers-4.18.0-553.153.1.el8_10.aarch64.rpm
- kernel-devel-4.18.0-553.153.1.el8_10.aarch64.rpm
- kernel-modules-4.18.0-553.153.1.el8_10.ppc64le.rpm
- kernel-modules-4.18.0-553.153.1.el8_10.x86_64.rpm
- kernel-devel-4.18.0-553.153.1.el8_10.x86_64.rpm
- kernel-tools-debuginfo-4.18.0-553.153.1.el8_10.s390x.rpm
- kernel-debuginfo-common-aarch64-4.18.0-553.153.1.el8_10.aarch64.rpm
- kernel-debug-debuginfo-4.18.0-553.153.1.el8_10.x86_64.rpm
- kernel-headers-4.18.0-553.153.1.el8_10.s390x.rpm
- kernel-core-4.18.0-553.153.1.el8_10.s390x.rpm
- kernel-debug-debuginfo-4.18.0-553.153.1.el8_10.s390x.rpm
- kernel-debug-modules-4.18.0-553.153.1.el8_10.x86_64.rpm
- kernel-debuginfo-common-ppc64le-4.18.0-553.153.1.el8_10.ppc64le.rpm
- kernel-core-4.18.0-553.153.1.el8_10.ppc64le.rpm
- kernel-modules-4.18.0-553.153.1.el8_10.s390x.rpm
- kernel-tools-4.18.0-553.153.1.el8_10.x86_64.rpm
- kernel-debug-core-4.18.0-553.153.1.el8_10.aarch64.rpm
- kernel-tools-libs-4.18.0-553.153.1.el8_10.aarch64.rpm
- kernel-debug-modules-extra-4.18.0-553.153.1.el8_10.s390x.rpm
- kernel-debuginfo-common-x86_64-4.18.0-553.153.1.el8_10.x86_64.rpm
- kernel-devel-4.18.0-553.153.1.el8_10.ppc64le.rpm
- kernel-tools-libs-devel-4.18.0-553.153.1.el8_10.aarch64.rpm
- kernel-tools-libs-devel-4.18.0-553.153.1.el8_10.ppc64le.rpm
- kernel-tools-libs-devel-4.18.0-553.153.1.el8_10.x86_64.rpm
- kernel-zfcpdump-4.18.0-553.153.1.el8_10.s390x.rpm
- kernel-core-4.18.0-553.153.1.el8_10.aarch64.rpm
- kernel-cross-headers-4.18.0-553.153.1.el8_10.x86_64.rpm
- kernel-4.18.0-553.153.1.el8_10.s390x.rpm
- kernel-zfcpdump-modules-4.18.0-553.153.1.el8_10.s390x.rpm
- perf-4.18.0-553.153.1.el8_10.ppc64le.rpm
- perf-4.18.0-553.153.1.el8_10.x86_64.rpm
- perf-debuginfo-4.18.0-553.153.1.el8_10.aarch64.rpm
- python3-perf-4.18.0-553.153.1.el8_10.s390x.rpm
- kernel-tools-libs-4.18.0-553.153.1.el8_10.x86_64.rpm
- kernel-zfcpdump-core-4.18.0-553.153.1.el8_10.s390x.rpm
- kernel-debug-modules-4.18.0-553.153.1.el8_10.s390x.rpm
- kernel-headers-4.18.0-553.153.1.el8_10.x86_64.rpm
- kernel-modules-extra-4.18.0-553.153.1.el8_10.aarch64.rpm
- kernel-debug-core-4.18.0-553.153.1.el8_10.ppc64le.rpm
- kernel-debug-debuginfo-4.18.0-553.153.1.el8_10.aarch64.rpm
- kernel-4.18.0-553.153.1.el8_10.src.rpm
- kernel-modules-extra-4.18.0-553.153.1.el8_10.ppc64le.rpm
- bpftool-4.18.0-553.153.1.el8_10.aarch64.rpm
- kernel-debug-modules-extra-4.18.0-553.153.1.el8_10.x86_64.rpm
- perf-4.18.0-553.153.1.el8_10.aarch64.rpm
- kernel-modules-extra-4.18.0-553.153.1.el8_10.x86_64.rpm
- perf-debuginfo-4.18.0-553.153.1.el8_10.s390x.rpm
- kernel-4.18.0-553.153.1.el8_10.ppc64le.rpm
- kernel-debug-debuginfo-4.18.0-553.153.1.el8_10.ppc64le.rpm
- perf-debuginfo-4.18.0-553.153.1.el8_10.x86_64.rpm
- python3-perf-debuginfo-4.18.0-553.153.1.el8_10.ppc64le.rpm
- kernel-zfcpdump-debuginfo-4.18.0-553.153.1.el8_10.s390x.rpm
- kernel-zfcpdump-modules-extra-4.18.0-553.153.1.el8_10.s390x.rpm
- kernel-tools-4.18.0-553.153.1.el8_10.aarch64.rpm
- python3-perf-4.18.0-553.153.1.el8_10.aarch64.rpm
- python3-perf-4.18.0-553.153.1.el8_10.ppc64le.rpm
- kernel-abi-stablelists-4.18.0-553.153.1.el8_10.noarch.rpm
- kernel-debug-devel-4.18.0-553.153.1.el8_10.x86_64.rpm
- kernel-devel-4.18.0-553.153.1.el8_10.s390x.rpm
- perf-4.18.0-553.153.1.el8_10.s390x.rpm
- kernel-modules-extra-4.18.0-553.153.1.el8_10.s390x.rpm
- kernel-cross-headers-4.18.0-553.153.1.el8_10.ppc64le.rpm
- kernel-debug-modules-4.18.0-553.153.1.el8_10.aarch64.rpm
- kernel-debug-4.18.0-553.153.1.el8_10.x86_64.rpm
- kernel-modules-4.18.0-553.153.1.el8_10.aarch64.rpm
- kernel-debug-devel-4.18.0-553.153.1.el8_10.s390x.rpm
- perf-debuginfo-4.18.0-553.153.1.el8_10.ppc64le.rpm
- kernel-debuginfo-4.18.0-553.153.1.el8_10.s390x.rpm
- kernel-debug-4.18.0-553.153.1.el8_10.s390x.rpm
- kernel-debug-modules-4.18.0-553.153.1.el8_10.ppc64le.rpm
- kernel-debug-modules-extra-4.18.0-553.153.1.el8_10.aarch64.rpm
- python3-perf-debuginfo-4.18.0-553.153.1.el8_10.aarch64.rpm
- bpftool-debuginfo-4.18.0-553.153.1.el8_10.ppc64le.rpm
- bpftool-4.18.0-553.153.1.el8_10.s390x.rpm
- kernel-4.18.0-553.153.1.el8_10.aarch64.rpm
- kernel-debug-core-4.18.0-553.153.1.el8_10.x86_64.rpm
- kernel-debug-devel-4.18.0-553.153.1.el8_10.ppc64le.rpm
- kernel-tools-4.18.0-553.153.1.el8_10.ppc64le.rpm
Fixes
CVEs
References
Additional information
- The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at Security Contacts and Procedures.
- Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.