Red Hat Fixes Cockpit Memory and Connection Exhaustion on RHEL 10
Tech GuruQuick Answer
Check Cockpit on RHEL 10. Apply RHSA-2026:96250 from the matching entitled repository. Restart affected Cockpit services, test management sign-in and configured URL-root paths, and verify service resource use.
Confirm Scope And Apply The Supported Remediation
What to do now: Record Cockpit packages, TCP 9090 exposure, reverse-proxy routing and management access. RHEL 10: installations of the Cockpit packages requiring RHSA-2026:96250. Match the full installed RPM, architecture and repository to the vendor product tree; a universal upstream version range is not stated. Apply RHSA-2026:96250 through the entitled Red Hat repositories. The fixed source build is cockpit-0:356.4-1.el10_2. Install the matching binary packages for the supported stream and architecture. Restart affected Cockpit services, test management sign-in and configured URL-root paths, and verify service resource use.
Last verified: 2026-11-09 UTC. Recheck the authoritative advisory and supported distribution channel before changing production.
Scope And Authority
| Product scope | RHEL 10; Cockpit |
|---|---|
| Advisory | RHSA-2026:96250 |
| CVEs | CVE-2026-76235, CVE-2026-91147, CVE-2026-91149 |
| Authoritative release date | November 9, 2026 at 12:56:01 UTC, from Red Hat CSAF initial_release_date. |
| Authority revision date | Red Hat records the substantive last-updated version at 2026-11-09T12:56:01+00:00. The CSAF generation timestamp is 2026-11-09T16:36:26+00:00; generation alone is not a material advisory revision. |
| Affected versions | RHEL 10: installations of the Cockpit packages requiring RHSA-2026:96250. Match the full installed RPM, architecture and repository to the vendor product tree; a universal upstream version range is not stated. |
| Fixed version | cockpit-0:356.4-1.el10_2 |
| CVSS base score | 7.5 (highest authority-stated CVSS 3.1 base score) |
| CVSS severity | High (CVSS); Important (Red Hat impact) |
| Exploitation status | Red Hat does not state exploitation in this advisory.; no exploitation claim is inferred. |
Authority CVSS by Vulnerability
| CVE-2026-76235 | CVSS 3.1: 7.5 (High) |
|---|---|
| CVE-2026-91147 | CVSS 3.1: 5.9 (Medium) |
| CVE-2026-91149 | CVSS 3.1: 7.5 (High) |
What Changed
Red Hat released RHSA-2026:96250 for RHEL 10, addressing unauthenticated memory leakage and denial of service in URL-root and connection handling. The update provides the distribution packages listed below; keep the Red Hat release and support channel matched during remediation.
What To Validate Now
- Inventory. Record Cockpit packages, TCP 9090 exposure, reverse-proxy routing and management access.
- Establish applicability. RHEL 10: installations of the Cockpit packages requiring RHSA-2026:96250. Match the full installed RPM, architecture and repository to the vendor product tree; a universal upstream version range is not stated.
- Remediate. Apply RHSA-2026:96250 through the entitled Red Hat repositories. The fixed source build is cockpit-0:356.4-1.el10_2. Install the matching binary packages for the supported stream and architecture.
- Validate. Restart affected Cockpit services, test management sign-in and configured URL-root paths, and verify service resource use.
- 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
Limit the listener to trusted management networks. Normalize required URL prefixes at a front-end proxy and assess rate limits; configuration controls do not replace the fixed package or address every listed flaw.
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.
Advisory facts are attributed to Red Hat Inc. The linked CSAF content is licensed under CC BY 4.0; TechGeeks operational guidance is summarized for this notice.
