RHSA-2026:49857: Moderate: kernel security, bug fix, and enhancement update
Moderate: kernel security, bug fix, and enhancement update
Other sources
The kernel packages contain the Linux kernel, the core of any Linux operating system.Security Fix(es): kernel: ipc: limit nextid allocation to the valid ID range (CVE-2026-52923) Bug Fix(es) and Enhancement(s): RHEL8.10 - KVM: s390: Limit adapter indicator access to mapped page (JIRA:RHEL-183880) CIFS mounts do not work with the latest kernel (JIRA:RHEL-213976) 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.
- Upgrade
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redhat/kernelto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10 - Upgrade
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redhat/bpftoolto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10 - Upgrade
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redhat/bpftool-debuginfoto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10 - Upgrade
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redhat/kernel-abi-stableliststo a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10 - Upgrade
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redhat/kernel-coreto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10 - Upgrade
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redhat/kernel-cross-headersto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10 - Upgrade
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redhat/kernel-debugto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10 - Upgrade
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redhat/kernel-debug-coreto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10 - Upgrade
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redhat/kernel-debug-debuginfoto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10 - Upgrade
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redhat/kernel-debug-develto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10 - Upgrade
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redhat/kernel-debug-modulesto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10 - Upgrade
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redhat/kernel-debug-modules-extrato a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10 - Upgrade
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redhat/kernel-debuginfoto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10 - Upgrade
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redhat/kernel-develto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10 - Upgrade
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redhat/kernel-docto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10 - Upgrade
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redhat/kernel-headersto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10 - Upgrade
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redhat/kernel-modulesto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10 - Upgrade
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redhat/kernel-modules-extrato a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10 - Upgrade
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redhat/kernel-toolsto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10 - Upgrade
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redhat/kernel-tools-debuginfoto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10 - Upgrade
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redhat/kernel-tools-libsto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10 - Upgrade
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redhat/perfto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10 - Upgrade
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redhat/perf-debuginfoto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10 - Upgrade
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redhat/python3-perfto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10 - Upgrade
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redhat/python3-perf-debuginfoto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10 - Upgrade
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redhat/kernel-debuginfo-common-s390xto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10 - Upgrade
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redhat/kernel-zfcpdumpto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10 - Upgrade
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redhat/kernel-zfcpdump-coreto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10 - Upgrade
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redhat/kernel-zfcpdump-debuginfoto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10 - Upgrade
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redhat/kernel-zfcpdump-develto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10 - Upgrade
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redhat/kernel-zfcpdump-modulesto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10 - Upgrade
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redhat/kernel-zfcpdump-modules-extrato a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10 - Upgrade
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redhat/kernel-debuginfo-common-ppc64leto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10 - Upgrade
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redhat/bpftoolto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10.aa - Upgrade
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redhat/bpftool-debuginfoto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10.aa - Upgrade
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redhat/kernelto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10.aa - Upgrade
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redhat/kernel-coreto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10.aa - Upgrade
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redhat/kernel-cross-headersto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10.aa - Upgrade
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redhat/kernel-debugto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10.aa - Upgrade
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redhat/kernel-debug-coreto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10.aa - Upgrade
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redhat/kernel-debug-debuginfoto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10.aa - Upgrade
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redhat/kernel-debug-develto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10.aa - Upgrade
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redhat/kernel-debug-modulesto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10.aa - Upgrade
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redhat/kernel-debug-modules-extrato a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10.aa - Upgrade
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redhat/kernel-debuginfoto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10.aa - Upgrade
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redhat/kernel-debuginfo-common-aarch64to a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10.aa - Upgrade
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redhat/kernel-develto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10.aa - Upgrade
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redhat/kernel-headersto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10.aa - Upgrade
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redhat/kernel-modulesto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10.aa - Upgrade
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redhat/kernel-modules-extrato a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10.aa - Upgrade
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redhat/kernel-toolsto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10.aa - Upgrade
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redhat/kernel-tools-debuginfoto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10.aa - Upgrade
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redhat/kernel-tools-libsto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10.aa - Upgrade
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redhat/perfto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10.aa - Upgrade
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redhat/perf-debuginfoto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10.aa - Upgrade
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redhat/python3-perfto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10.aa - Upgrade
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redhat/python3-perf-debuginfoto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10.aa - Upgrade
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redhat/kernel-tools-libs-develto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10 - Upgrade
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redhat/kernel-tools-libs-develto a version that resolves this vulnerability.Fixed in 4.18.0-553.151.1.el8_10.aa - Upgrade
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kernelto a version that resolves this vulnerability.Patch CVE-2026-52923 - Upgrade
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kernelto a version that resolves this vulnerability.Fixed in RHEL8.10Patch JIRA:RHEL-183880 - Upgrade
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kernelto a version that resolves this vulnerability.Patch JIRA:RHEL-213976 - Operational
Reboot the system after applying the kernel update so the changes take effect.
Event History
Frequently Asked Questions
What is the severity of RHSA-2026:49857?
The severity of RHSA-2026:49857 is medium, rated at 4.
What are the security fixes included in RHSA-2026:49857?
RHSA-2026:49857 includes a security fix for the kernel related to limiting next_id allocation to the valid ID range, identified as CVE-2026-52923.
What software packages are affected by RHSA-2026:49857?
The affected software packages include redhat/kernel, redhat/bpftool, redhat/kernel-core, and several others related to the Linux kernel.
How do I fix the issues addressed in RHSA-2026:49857?
To resolve the issues in RHSA-2026:49857, you should apply the updated kernel packages provided by Red Hat.
When was RHSA-2026:49857 published?
RHSA-2026:49857 was published on August 4, 2026.