Red Hat Updates .NET 8 and 9 on RHEL 9.6 EUS
Tech GuruQuick Answer
Red Hat fixes ASP.NET Core privilege escalation in both runtimes and a Brotli decoder issue in the .NET 8 update. Confirm the exact supported stream and installed build, apply the corresponding erratum, validate operations, and retain evidence.
Confirm Scope And Apply The Supported Remediation
What to do now: Record runtime and SDK builds, service identities, self-contained deployments and container images. Match the documented versions, enabled features and attack prerequisites to the deployment before assigning applicability. Install the applicable signed update from the entitled Red Hat repository, preserving the package epoch, architecture and support stream. Restart or redeploy affected applications after updating the correct runtime package. Verify application startup, authentication, file ownership and compressed input handling; retain installed and active versions, test results and change records.
Last verified: 2026-11-02 UTC. Recheck the authoritative advisory and supported distribution channel before changing production.
Scope And Authority
| Product scope | .NET 8 and 9 on RHEL 9.6 EUS |
|---|---|
| Advisory | RHSA-2026:93459 / RHSA-2026:93457 |
| CVEs | CVE-2026-111497, CVE-2026-114148 |
| Authoritative release date | 2026-11-02T05:32:35Z (latest release in the group; per-advisory dates below) |
| Authority revision date | 2026-11-02T11:06:00Z (latest authority revision) |
| Affected versions | Advisory-listed packages or images before the applicable fixed build on Red Hat CodeReady Linux Builder EUS (v.9.6); Red Hat Enterprise Linux AppStream EUS (v.9.6). |
| Fixed version | dotnet8.0-0:8.0.133-1.el9_6.src; dotnet9.0-0:9.0.123-1.el9_6.src |
| CVSS base score | 7.8-8.1 (CVSS v3.1; CVE-specific) |
| CVSS severity | High |
| Exploitation status | The cited authority does not state that this issue is being maliciously exploited.; no exploitation claim is inferred. |
Authority-Specific Scope And Version Evidence
| RHSA-2026:93459 | Released 2026-11-02T05:28:49Z; revised 2026-11-02T11:06:00Z. Red Hat CodeReady Linux Builder EUS (v.9.6), Red Hat Enterprise Linux AppStream EUS (v.9.6). Fixed source-package families: dotnet9.0-0:9.0.123-1.el9_6.src. CVSS 7.8 (CVSS v3.1; CVE-specific); High. Vendor rating: Important. |
|---|---|
| RHSA-2026:93457 | Released 2026-11-02T05:32:35Z; revised 2026-11-02T11:05:59Z. Red Hat CodeReady Linux Builder EUS (v.9.6), Red Hat Enterprise Linux AppStream EUS (v.9.6). Fixed source-package families: dotnet8.0-0:8.0.133-1.el9_6.src. CVSS 7.8-8.1 (CVSS v3.1; CVE-specific); High. Vendor rating: Important. |
What Changed
Red Hat fixes ASP.NET Core privilege escalation in both runtimes and a Brotli decoder issue in the .NET 8 update.
What To Validate Now
- Inventory. Record runtime and SDK builds, service identities, self-contained deployments and container images.
- Establish applicability. Match the documented versions, enabled features and attack prerequisites to the deployment before assigning applicability.
- Remediate. Install the applicable signed update from the entitled Red Hat repository, preserving the package epoch, architecture and support stream. Restart or redeploy affected applications after updating the correct runtime package.
- Validate. Verify application startup, authentication, file ownership and compressed input handling; retain installed and active versions, test results and change records.
- 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
Self-contained deployments may carry a private runtime and require a separate supported rebuild. CVSS values are per-CVE authority scores, not one score assigned to the entire update.
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.
