RHSA-2026:9514: Moderate: kernel security update
Moderate: kernel security update
Other sources
The kernel packages contain the Linux kernel, the core of any Linux operating system.Security Fix(es): kernel: smc: Fix use-after-free in pnetfindbasendev() (CVE-2025-40064) kernel: smc: Use skdstget() and dstdevrcu() in smcclcprfxmatch() (CVE-2025-40168) kernel: net/sched: clsu32: use skbheaderpointercareful() (CVE-2026-23204) kernel: kernel: Privilege escalation or denial of service via use-after-free in nftablesaddchain() (CVE-2026-23231) 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.
— Red Hat
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
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redhat/kernelto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6 - Upgrade
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redhat/bpftoolto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6 - Upgrade
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redhat/bpftool-debuginfoto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6 - Upgrade
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redhat/kernel-abi-stableliststo a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6 - Upgrade
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redhat/kernel-coreto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6 - Upgrade
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redhat/kernel-cross-headersto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6 - Upgrade
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redhat/kernel-debugto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6 - Upgrade
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redhat/kernel-debug-coreto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6 - Upgrade
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redhat/kernel-debug-debuginfoto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6 - Upgrade
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redhat/kernel-debug-develto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6 - Upgrade
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redhat/kernel-debug-modulesto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6 - Upgrade
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redhat/kernel-debug-modules-extrato a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6 - Upgrade
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redhat/kernel-debuginfoto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6 - Upgrade
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redhat/kernel-develto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6 - Upgrade
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redhat/kernel-docto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6 - Upgrade
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redhat/kernel-headersto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6 - Upgrade
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redhat/kernel-modulesto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6 - Upgrade
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redhat/kernel-modules-extrato a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6 - Upgrade
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redhat/kernel-toolsto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6 - Upgrade
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redhat/kernel-tools-debuginfoto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6 - Upgrade
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redhat/kernel-tools-libsto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6 - Upgrade
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redhat/perfto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6 - Upgrade
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redhat/perf-debuginfoto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6 - Upgrade
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redhat/python3-perfto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6 - Upgrade
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redhat/python3-perf-debuginfoto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6 - Upgrade
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redhat/kernel-debuginfo-common-ppc64leto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6 - Upgrade
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redhat/bpftoolto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6.aa - Upgrade
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redhat/bpftool-debuginfoto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6.aa - Upgrade
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redhat/kernelto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6.aa - Upgrade
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redhat/kernel-coreto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6.aa - Upgrade
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redhat/kernel-cross-headersto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6.aa - Upgrade
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redhat/kernel-debugto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6.aa - Upgrade
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redhat/kernel-debug-coreto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6.aa - Upgrade
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redhat/kernel-debug-debuginfoto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6.aa - Upgrade
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redhat/kernel-debug-develto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6.aa - Upgrade
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redhat/kernel-debug-modulesto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6.aa - Upgrade
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redhat/kernel-debug-modules-extrato a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6.aa - Upgrade
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redhat/kernel-debuginfoto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6.aa - Upgrade
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redhat/kernel-debuginfo-common-aarch64to a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6.aa - Upgrade
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redhat/kernel-develto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6.aa - Upgrade
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redhat/kernel-headersto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6.aa - Upgrade
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redhat/kernel-modulesto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6.aa - Upgrade
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redhat/kernel-modules-extrato a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6.aa - Upgrade
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redhat/kernel-toolsto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6.aa - Upgrade
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redhat/kernel-tools-debuginfoto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6.aa - Upgrade
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redhat/kernel-tools-libsto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6.aa - Upgrade
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redhat/perfto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6.aa - Upgrade
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redhat/perf-debuginfoto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6.aa - Upgrade
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redhat/python3-perfto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6.aa - Upgrade
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redhat/python3-perf-debuginfoto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6.aa - Upgrade
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redhat/kernel-debuginfo-common-s390xto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6 - Upgrade
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redhat/kernel-zfcpdumpto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6 - Upgrade
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redhat/kernel-zfcpdump-coreto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6 - Upgrade
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redhat/kernel-zfcpdump-debuginfoto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6 - Upgrade
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redhat/kernel-zfcpdump-develto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6 - Upgrade
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redhat/kernel-zfcpdump-modulesto a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6 - Upgrade
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redhat/kernel-zfcpdump-modules-extrato a version that resolves this vulnerability.Fixed in 4.18.0-372.188.1.el8_6 - Upgrade
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kernelto a version that resolves this vulnerability.Patch CVE-2026-23231 - Upgrade
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kernelto a version that resolves this vulnerability.Patch CVE-2026-23204 - Upgrade
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kernelto a version that resolves this vulnerability.Patch CVE-2025-40168 - Upgrade
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kernelto a version that resolves this vulnerability.Patch CVE-2025-40064 - Operational
Reboot the system so the kernel security update takes effect.
Event History
Frequently Asked Questions
What is the severity of RHSA-2026:9514?
The severity of RHSA-2026:9514 is categorized as moderate.
How do I fix RHSA-2026:9514?
To fix RHSA-2026:9514, update to kernel version 4.18.0-372.188.1.el8_6.
What vulnerability does RHSA-2026:9514 address?
RHSA-2026:9514 addresses a use-after-free vulnerability in the SMC (Shared Memory Communications) implementation.
What systems are affected by RHSA-2026:9514?
RHSA-2026:9514 affects various Red Hat Enterprise Linux products including Server, Update Services for SAP Solutions, and Extended Update Support.
Is a reboot required after applying the fix for RHSA-2026:9514?
Yes, a reboot is required to apply the changes from the kernel update specified in RHSA-2026:9514.