Red Hat RHEL 8 Kernel Updates Fix 29 Vulnerabilities
Tech GuruQuick Answer
Red Hat published RHSA-2026:75746 and RHSA-2026:75747 for RHEL 8 standard and Real Time Linux kernel packages. Match entitled systems to the advisory scope, install kernel 4.18.0-553.171.1.el8_10 / kernel-rt 4.18.0-553.171.1.rt7.512.el8_10, reboot into the updated kernel, validate dependent operations, and retain change evidence.
Validate Linux kernel Scope And Apply The Red Hat Fix
What to do now: Inventory RHEL 8 standard and Real Time Linux kernel packages, confirm the exact entitled branch and installed build, apply the advisory-listed content and reboot through change control, validate representative services, and document exceptions.
Last verified: 2026-10-05 UTC. Recheck the authoritative advisory and supported distribution channel before changing production.
Scope And Authority
| Product scope | RHEL 8 standard and Real Time Linux kernel packages |
|---|---|
| Advisory | RHSA-2026:75746 / RHSA-2026:75747 |
| CVEs | CVE-2022-50756, CVE-2023-54048, CVE-2025-39994, CVE-2025-40242, CVE-2026-23105, CVE-2026-45856, CVE-2026-45861, CVE-2026-46319, CVE-2026-52972, CVE-2026-53049, CVE-2026-53230, CVE-2026-53270, CVE-2026-63794, CVE-2026-63829, CVE-2026-63992, CVE-2026-63994, CVE-2026-68432, CVE-2026-72052, CVE-2026-72255, CVE-2026-74516, CVE-2026-74569, CVE-2026-74669, CVE-2026-74744, CVE-2026-74746, CVE-2026-80921, CVE-2026-89481, CVE-2026-89972, CVE-2026-90227, CVE-2026-97417 |
| Authoritative release date | 2026-10-05 11:10:00 UTC |
| Authority revision date | 2026-10-05 14:07:59 UTC |
| Affected versions | The supported RHEL 8 standard and Real Time Linux kernel packages builds identified as affected in the advisory product-status relationships. |
| Fixed version | kernel 4.18.0-553.171.1.el8_10 / kernel-rt 4.18.0-553.171.1.rt7.512.el8_10 |
| CVSS base score | 4.7 / 5.8 / 5.9 / 7.0 / 7.1 / 7.5 / 7.8 / 8.8 (CVSS v3.1) |
| CVSS severity | Medium to High |
| Exploitation status | Not stated by the authority; no exploitation claim is inferred. |
What Changed
Red Hat published supported Linux kernel replacement content for the advisory-listed CVEs and product branches.
What To Validate Now
- Inventory. Locate RHEL 8 standard and Real Time Linux kernel packages; record the installed build, repository and entitlement, owner, exposure, dependencies, and maintenance group.
- Establish applicability. Compare every system with the product and package relationships in RHSA-2026:75746 and RHSA-2026:75747. Do not infer applicability from the component name or CVSS rating alone.
- Remediate. Install kernel 4.18.0-553.171.1.el8_10 / kernel-rt 4.18.0-553.171.1.rt7.512.el8_10 from the supported Red Hat channel for the exact branch. Reboot into the updated kernel.
- Validate. Confirm the installed running kernel, exercise representative Linux kernel functions and recovery paths, monitor for regressions, and record the result.
- Retain evidence. Preserve asset and owner identifiers, the applicability decision, before-and-after versions, change approval, installation output, validation results, and any exception or rollback record.
Operational Cautions
The replacement kernel requires a controlled reboot. Validate standard or Real Time branch selection, modules, latency-sensitive workloads, clustering, and rollback. Preserve pre-change versions, logs, installation output, validation evidence, and any rollback decision.
Evidence To Retain
- Exact product, release stream, package or application version, enabled feature, environment, and accountable owner.
- UTC timestamps, authority revision, approved change record, installer or package-manager output, and resulting version.
- Relevant logs and monitoring evidence, test results, exceptions, compensating controls, and rollback decisions.
Related TechGeeks Resources
Authoritative References
Correction policy: If the authority changes affected versions, fixed versions, severity, exploitation information, mitigations, or required action, TechGeeks will update this notice and its verification date.
