Issued:

2026-07-24

Updated:

2026-07-24

RHSA-2026:45115 - Important: kernel security update

Synopsis

Important: kernel security update

Type/Severity

Security Advisory: Important

Topic

An update for the kernel package is now available for Red Hat Enterprise Linux 8.10 Extended Update Support.

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: KVM: x86: Don't (re)check L1 intercepts when completing userspace I/O (CVE-2025-40026)

• kernel: xfrm single-frag length not properly limited

• kernel: dm log: fix out-of-bounds write due to region_count overflow (CVE-2026-53059)

• kernel: tipc: fix double-free in tipc_buf_append() (CVE-2026-52993)

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

Affected Products

Updated Packages

• kernel-tools-debuginfo-4.18.0-553.147.1.el8_10.ppc64le.rpm
• kernel-debuginfo-4.18.0-553.147.1.el8_10.ppc64le.rpm
• python3-perf-debuginfo-4.18.0-553.147.1.el8_10.ppc64le.rpm
• kernel-4.18.0-553.147.1.el8_10.s390x.rpm
• kernel-debug-debuginfo-4.18.0-553.147.1.el8_10.aarch64.rpm
• kernel-zfcpdump-modules-extra-4.18.0-553.147.1.el8_10.s390x.rpm
• kernel-debug-4.18.0-553.147.1.el8_10.s390x.rpm
• perf-debuginfo-4.18.0-553.147.1.el8_10.x86_64.rpm
• kernel-4.18.0-553.147.1.el8_10.aarch64.rpm
• kernel-4.18.0-553.147.1.el8_10.x86_64.rpm
• kernel-debuginfo-common-aarch64-4.18.0-553.147.1.el8_10.aarch64.rpm
• kernel-debuginfo-common-x86_64-4.18.0-553.147.1.el8_10.x86_64.rpm
• kernel-debug-debuginfo-4.18.0-553.147.1.el8_10.ppc64le.rpm
• kernel-debug-devel-4.18.0-553.147.1.el8_10.aarch64.rpm
• kernel-debuginfo-4.18.0-553.147.1.el8_10.aarch64.rpm
• kernel-tools-libs-devel-4.18.0-553.147.1.el8_10.aarch64.rpm
• perf-debuginfo-4.18.0-553.147.1.el8_10.s390x.rpm
• kernel-debug-modules-4.18.0-553.147.1.el8_10.ppc64le.rpm
• kernel-headers-4.18.0-553.147.1.el8_10.aarch64.rpm
• kernel-modules-extra-4.18.0-553.147.1.el8_10.aarch64.rpm
• bpftool-debuginfo-4.18.0-553.147.1.el8_10.ppc64le.rpm
• bpftool-debuginfo-4.18.0-553.147.1.el8_10.x86_64.rpm
• kernel-devel-4.18.0-553.147.1.el8_10.aarch64.rpm
• kernel-tools-libs-4.18.0-553.147.1.el8_10.ppc64le.rpm
• kernel-debug-modules-4.18.0-553.147.1.el8_10.aarch64.rpm
• kernel-4.18.0-553.147.1.el8_10.src.rpm
• kernel-tools-4.18.0-553.147.1.el8_10.s390x.rpm
• perf-4.18.0-553.147.1.el8_10.x86_64.rpm
• kernel-debug-4.18.0-553.147.1.el8_10.x86_64.rpm
• kernel-debug-debuginfo-4.18.0-553.147.1.el8_10.s390x.rpm
• kernel-cross-headers-4.18.0-553.147.1.el8_10.ppc64le.rpm
• kernel-debug-modules-4.18.0-553.147.1.el8_10.s390x.rpm
• kernel-debug-core-4.18.0-553.147.1.el8_10.s390x.rpm
• kernel-devel-4.18.0-553.147.1.el8_10.s390x.rpm
• kernel-debug-modules-4.18.0-553.147.1.el8_10.x86_64.rpm
• kernel-modules-extra-4.18.0-553.147.1.el8_10.s390x.rpm
• kernel-abi-stablelists-4.18.0-553.147.1.el8_10.noarch.rpm
• kernel-debug-modules-extra-4.18.0-553.147.1.el8_10.aarch64.rpm
• kernel-zfcpdump-devel-4.18.0-553.147.1.el8_10.s390x.rpm
• kernel-cross-headers-4.18.0-553.147.1.el8_10.x86_64.rpm
• perf-4.18.0-553.147.1.el8_10.aarch64.rpm
• perf-debuginfo-4.18.0-553.147.1.el8_10.ppc64le.rpm
• kernel-debug-devel-4.18.0-553.147.1.el8_10.ppc64le.rpm
• kernel-debuginfo-4.18.0-553.147.1.el8_10.x86_64.rpm
• kernel-headers-4.18.0-553.147.1.el8_10.s390x.rpm
• python3-perf-debuginfo-4.18.0-553.147.1.el8_10.s390x.rpm
• kernel-zfcpdump-core-4.18.0-553.147.1.el8_10.s390x.rpm
• bpftool-4.18.0-553.147.1.el8_10.x86_64.rpm
• kernel-debug-core-4.18.0-553.147.1.el8_10.aarch64.rpm
• kernel-tools-libs-4.18.0-553.147.1.el8_10.aarch64.rpm
• kernel-debug-4.18.0-553.147.1.el8_10.aarch64.rpm
• kernel-debug-devel-4.18.0-553.147.1.el8_10.s390x.rpm
• kernel-core-4.18.0-553.147.1.el8_10.x86_64.rpm
• kernel-doc-4.18.0-553.147.1.el8_10.noarch.rpm
• kernel-core-4.18.0-553.147.1.el8_10.s390x.rpm
• kernel-debug-4.18.0-553.147.1.el8_10.ppc64le.rpm
• kernel-modules-4.18.0-553.147.1.el8_10.aarch64.rpm
• kernel-modules-4.18.0-553.147.1.el8_10.s390x.rpm
• kernel-modules-extra-4.18.0-553.147.1.el8_10.ppc64le.rpm
• kernel-tools-4.18.0-553.147.1.el8_10.x86_64.rpm
• kernel-tools-debuginfo-4.18.0-553.147.1.el8_10.s390x.rpm
• python3-perf-4.18.0-553.147.1.el8_10.s390x.rpm
• kernel-cross-headers-4.18.0-553.147.1.el8_10.s390x.rpm
• kernel-debug-core-4.18.0-553.147.1.el8_10.x86_64.rpm
• kernel-debug-core-4.18.0-553.147.1.el8_10.ppc64le.rpm
• kernel-debuginfo-4.18.0-553.147.1.el8_10.s390x.rpm
• kernel-debuginfo-common-s390x-4.18.0-553.147.1.el8_10.s390x.rpm
• kernel-modules-4.18.0-553.147.1.el8_10.ppc64le.rpm
• bpftool-debuginfo-4.18.0-553.147.1.el8_10.s390x.rpm
• kernel-cross-headers-4.18.0-553.147.1.el8_10.aarch64.rpm
• kernel-tools-libs-4.18.0-553.147.1.el8_10.x86_64.rpm
• kernel-tools-4.18.0-553.147.1.el8_10.ppc64le.rpm
• bpftool-debuginfo-4.18.0-553.147.1.el8_10.aarch64.rpm
• kernel-core-4.18.0-553.147.1.el8_10.aarch64.rpm
• bpftool-4.18.0-553.147.1.el8_10.aarch64.rpm
• kernel-headers-4.18.0-553.147.1.el8_10.x86_64.rpm
• python3-perf-debuginfo-4.18.0-553.147.1.el8_10.aarch64.rpm
• kernel-tools-libs-devel-4.18.0-553.147.1.el8_10.ppc64le.rpm
• kernel-debuginfo-common-ppc64le-4.18.0-553.147.1.el8_10.ppc64le.rpm
• kernel-4.18.0-553.147.1.el8_10.ppc64le.rpm
• kernel-tools-debuginfo-4.18.0-553.147.1.el8_10.x86_64.rpm
• kernel-modules-extra-4.18.0-553.147.1.el8_10.x86_64.rpm
• kernel-zfcpdump-4.18.0-553.147.1.el8_10.s390x.rpm
• kernel-zfcpdump-modules-4.18.0-553.147.1.el8_10.s390x.rpm
• kernel-tools-4.18.0-553.147.1.el8_10.aarch64.rpm
• python3-perf-4.18.0-553.147.1.el8_10.aarch64.rpm
• bpftool-4.18.0-553.147.1.el8_10.ppc64le.rpm
• kernel-debug-modules-extra-4.18.0-553.147.1.el8_10.s390x.rpm
• python3-perf-4.18.0-553.147.1.el8_10.ppc64le.rpm
• kernel-tools-debuginfo-4.18.0-553.147.1.el8_10.aarch64.rpm
• python3-perf-debuginfo-4.18.0-553.147.1.el8_10.x86_64.rpm
• kernel-zfcpdump-debuginfo-4.18.0-553.147.1.el8_10.s390x.rpm
• perf-4.18.0-553.147.1.el8_10.s390x.rpm
• python3-perf-4.18.0-553.147.1.el8_10.x86_64.rpm
• perf-debuginfo-4.18.0-553.147.1.el8_10.aarch64.rpm
• kernel-debug-modules-extra-4.18.0-553.147.1.el8_10.x86_64.rpm
• perf-4.18.0-553.147.1.el8_10.ppc64le.rpm
• kernel-debug-debuginfo-4.18.0-553.147.1.el8_10.x86_64.rpm
• kernel-debug-devel-4.18.0-553.147.1.el8_10.x86_64.rpm
• kernel-devel-4.18.0-553.147.1.el8_10.x86_64.rpm
• kernel-debug-modules-extra-4.18.0-553.147.1.el8_10.ppc64le.rpm
• kernel-devel-4.18.0-553.147.1.el8_10.ppc64le.rpm
• bpftool-4.18.0-553.147.1.el8_10.s390x.rpm
• kernel-modules-4.18.0-553.147.1.el8_10.x86_64.rpm
• kernel-tools-libs-devel-4.18.0-553.147.1.el8_10.x86_64.rpm
• kernel-headers-4.18.0-553.147.1.el8_10.ppc64le.rpm
• kernel-core-4.18.0-553.147.1.el8_10.ppc64le.rpm

Fixes

• This content is not included.BZ - 2406712
• This content is not included.BZ - 2492277
• This content is not included.BZ - 2492437

CVEs

• CVE-2025-40026
• CVE-2026-52993
• CVE-2026-53059
• This content is not included.CVE-2026-64561

References

• https://access.redhat.com/security/updates/classification/#important

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.