Red Hat Fixes Kernel Networking and Memory-Safety Flaws on RHEL 10
Tech GuruQuick Answer
Apply RHSA-2026:97040 to applicable RHEL 10 systems using the entitled repository. Schedule a reboot into the fixed kernel, verify the running release, and test networking, storage and representative workloads. Keep a tested boot recovery path and coordinate real-time workloads separately.
Confirm Scope And Apply The Supported Remediation
What to do now: Record OS release, enabled repositories, architecture, installed Kernel packages, application dependencies and owners. Match the advisory product tree and fixed package identifiers to the system. Do not generalize the fixed source build to another RHEL stream, architecture or separately bundled copy. Install the supported binary package updates for RHSA-2026:97040 from the entitled Red Hat repositories. Retain the full epoch, version, release and architecture; the source build reference is not an instruction to install an SRPM. Schedule a reboot into the fixed kernel, verify the running release, and test networking, storage and representative workloads. Keep a tested boot recovery path and coordinate real-time workloads separately.
Last verified: 2026-11-10 UTC. Recheck the authoritative advisory and supported distribution channel before changing production.
Scope And Authority
| Product scope | Kernel packages on Red Hat Enterprise Linux 10 |
|---|---|
| Advisory | RHSA-2026:97040 |
| CVEs | CVE-2026-23066, CVE-2026-23239, CVE-2026-23240, CVE-2026-52945, CVE-2026-52952, CVE-2026-53395, CVE-2026-63914, CVE-2026-63987, CVE-2026-64000, CVE-2026-64020, CVE-2026-64025, CVE-2026-64279, CVE-2026-64355, CVE-2026-64375, CVE-2026-64496, CVE-2026-68103, CVE-2026-68379, CVE-2026-68390, CVE-2026-72319 |
| Authoritative release date | November 10, 2026 at 12:55:46 UTC, from Red Hat CSAF initial_release_date. |
| Authority revision date | Last substantive update recorded: 2026-11-10T12:55:46+00:00. CSAF generation timestamp: 2026-11-10T14:05:57+00:00; generation alone is not a material revision. |
| Affected versions | Package and architecture combinations identified by RHSA-2026:97040 in Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10), Red Hat Enterprise Linux Real Time (v. 10), Red Hat Enterprise Linux Real Time for NFV (v. 10). Red Hat does not state a universal lower affected-version boundary; confirm advisory applicability in the entitled repository. |
| Fixed version | Binary packages corresponding to source build kernel-0:6.12.0-264.9.1.el10_3 |
| CVSS base score | 8.8 maximum (official CVSS v3.1 base score) |
| CVSS severity | High (CVSS); Important (Red Hat impact) |
| Exploitation status | Red Hat does not state malicious exploitation in this advisory.; no exploitation claim is inferred. |
What Changed
Red Hat corrected 19 kernel vulnerabilities across networking, TLS, device handling and other subsystems. Impacts and required access vary by CVE; the maximum official CVSS base score is 8.8.
What To Validate Now
- Inventory. Record OS release, enabled repositories, architecture, installed Kernel packages, application dependencies and owners.
- Establish applicability. Match the advisory product tree and fixed package identifiers to the system. Do not generalize the fixed source build to another RHEL stream, architecture or separately bundled copy.
- Remediate. Install the supported binary package updates for RHSA-2026:97040 from the entitled Red Hat repositories. Retain the full epoch, version, release and architecture; the source build reference is not an instruction to install an SRPM.
- Validate. Schedule a reboot into the fixed kernel, verify the running release, and test networking, storage and representative workloads. Keep a tested boot recovery path and coordinate real-time workloads separately.
- 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
Review Red Hat prerequisites and plan service availability before rollout. A package update on disk does not change the running kernel. Severity does not establish exploitation or customer applicability.
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.
Official Per-CVE Scores
- CVE-2026-23066: 7.4 HIGH (CVSS v3.1).
- CVE-2026-23239: 5.8 MEDIUM (CVSS v3.1).
- CVE-2026-23240: 5.8 MEDIUM (CVSS v3.1).
- CVE-2026-52945: 7.0 HIGH (CVSS v3.1).
- CVE-2026-52952: 7.0 HIGH (CVSS v3.1).
- CVE-2026-53395: 7.0 HIGH (CVSS v3.1).
- CVE-2026-63914: 5.2 MEDIUM (CVSS v3.1).
- CVE-2026-63987: 7.0 HIGH (CVSS v3.1).
- CVE-2026-64000: 6.5 MEDIUM (CVSS v3.1).
- CVE-2026-64020: 7.1 HIGH (CVSS v3.1).
- CVE-2026-64025: 7.0 HIGH (CVSS v3.1).
- CVE-2026-64279: 5.5 MEDIUM (CVSS v3.1).
- CVE-2026-64355: 7.0 HIGH (CVSS v3.1).
- CVE-2026-64375: 7.0 HIGH (CVSS v3.1).
- CVE-2026-64496: 5.5 MEDIUM (CVSS v3.1).
- CVE-2026-68103: 6.1 MEDIUM (CVSS v3.1).
- CVE-2026-68379: 7.5 HIGH (CVSS v3.1).
- CVE-2026-68390: 4.8 MEDIUM (CVSS v3.1).
- CVE-2026-72319: 8.8 HIGH (CVSS v3.1).
