RHSA-2026:45115: Important: kernel security update
Important: kernel security update
Other sources
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 regioncount overflow (CVE-2026-53059) kernel: tipc: fix double-free in tipcbufappend() (CVE-2026-52993)
— Red Hat
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
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redhat/kernelto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10 - Upgrade
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redhat/bpftoolto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10 - Upgrade
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redhat/bpftool-debuginfoto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10 - Upgrade
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redhat/kernel-abi-stableliststo a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10 - Upgrade
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redhat/kernel-coreto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10 - Upgrade
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redhat/kernel-cross-headersto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10 - Upgrade
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redhat/kernel-debugto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10 - Upgrade
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redhat/kernel-debug-coreto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10 - Upgrade
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redhat/kernel-debug-debuginfoto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10 - Upgrade
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redhat/kernel-debug-develto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10 - Upgrade
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redhat/kernel-debug-modulesto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10 - Upgrade
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redhat/kernel-debug-modules-extrato a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10 - Upgrade
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redhat/kernel-debuginfoto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10 - Upgrade
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redhat/kernel-develto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10 - Upgrade
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redhat/kernel-docto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10 - Upgrade
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redhat/kernel-headersto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10 - Upgrade
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redhat/kernel-modulesto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10 - Upgrade
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redhat/kernel-modules-extrato a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10 - Upgrade
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redhat/kernel-toolsto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10 - Upgrade
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redhat/kernel-tools-debuginfoto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10 - Upgrade
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redhat/kernel-tools-libsto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10 - Upgrade
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redhat/perfto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10 - Upgrade
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redhat/perf-debuginfoto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10 - Upgrade
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redhat/python3-perfto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10 - Upgrade
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redhat/python3-perf-debuginfoto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10 - Upgrade
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redhat/kernel-debuginfo-common-s390xto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10 - Upgrade
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redhat/kernel-zfcpdumpto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10 - Upgrade
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redhat/kernel-zfcpdump-coreto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10 - Upgrade
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redhat/kernel-zfcpdump-debuginfoto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10 - Upgrade
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redhat/kernel-zfcpdump-develto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10 - Upgrade
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redhat/kernel-zfcpdump-modulesto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10 - Upgrade
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redhat/kernel-zfcpdump-modules-extrato a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10 - Upgrade
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redhat/kernel-debuginfo-common-ppc64leto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10 - Upgrade
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redhat/bpftoolto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10.aa - Upgrade
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redhat/bpftool-debuginfoto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10.aa - Upgrade
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redhat/kernelto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10.aa - Upgrade
Upgrade
redhat/kernel-coreto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10.aa - Upgrade
Upgrade
redhat/kernel-cross-headersto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10.aa - Upgrade
Upgrade
redhat/kernel-debugto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10.aa - Upgrade
Upgrade
redhat/kernel-debug-coreto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10.aa - Upgrade
Upgrade
redhat/kernel-debug-debuginfoto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10.aa - Upgrade
Upgrade
redhat/kernel-debug-develto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10.aa - Upgrade
Upgrade
redhat/kernel-debug-modulesto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10.aa - Upgrade
Upgrade
redhat/kernel-debug-modules-extrato a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10.aa - Upgrade
Upgrade
redhat/kernel-debuginfoto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10.aa - Upgrade
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redhat/kernel-debuginfo-common-aarch64to a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10.aa - Upgrade
Upgrade
redhat/kernel-develto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10.aa - Upgrade
Upgrade
redhat/kernel-headersto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10.aa - Upgrade
Upgrade
redhat/kernel-modulesto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10.aa - Upgrade
Upgrade
redhat/kernel-modules-extrato a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10.aa - Upgrade
Upgrade
redhat/kernel-toolsto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10.aa - Upgrade
Upgrade
redhat/kernel-tools-debuginfoto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10.aa - Upgrade
Upgrade
redhat/kernel-tools-libsto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10.aa - Upgrade
Upgrade
redhat/perfto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10.aa - Upgrade
Upgrade
redhat/perf-debuginfoto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10.aa - Upgrade
Upgrade
redhat/python3-perfto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10.aa - Upgrade
Upgrade
redhat/python3-perf-debuginfoto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10.aa - Upgrade
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redhat/kernel-tools-libs-develto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10 - Upgrade
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redhat/kernel-tools-libs-develto a version that resolves this vulnerability.Fixed in 4.18.0-553.147.1.el8_10.aa
Event History
Frequently Asked Questions
What is the severity of RHSA-2026:45115?
The severity of RHSA-2026:45115 is high, with a CVSS score of 7.
What vulnerabilities are addressed in RHSA-2026:45115?
RHSA-2026:45115 addresses issues including improper handling of L1 intercepts in KVM and limitations in xfrm single-frag length.
How do I fix RHSA-2026:45115?
To fix RHSA-2026:45115, you should update your kernel packages to the latest version provided by Red Hat.
Which software packages are affected by RHSA-2026:45115?
The affected software packages include redhat/kernel, redhat/bpftool, and various kernel debug packages.
When was RHSA-2026:45115 published?
RHSA-2026:45115 was published on July 24, 2026.