Red Hat Security Advisory: Satellite 6.16.6.1 Async Update
Red Hat Satellite is a system management solution that allows organizations to configure and maintain their systems without the necessity to provide public Internet access to their servers or other client systems. It performs provisioning and configuration management of predefined standard operating environments. Bug Fix(es): * Clean duplicate erratum packages before bigint migration (6.16) (SAT-41984) Security Fix(es): * python-urllib3: urllib3: Unbounded decompression chain leads to resource exhaustion (CVE-2025-66418) * python-urllib3: urllib3 vulnerable to decompression-bomb safeguard bypass when following HTTP redirects (streaming API) (CVE-2026-21441) * python-urllib3: urllib3 Streaming API improperly handles highly compressed data (CVE-2025-66471) Users of Red Hat Satellite are advised to upgrade to these updated packages, which fix these bugs. 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.
AI Analysis
Technical Summary
Red Hat Satellite 6.16 for RHEL 8 and 9 uses python-urllib3, which had vulnerabilities involving unbounded decompression chains leading to resource exhaustion (CVE-2025-66418), improper handling of highly compressed data in the streaming API (CVE-2025-66471), and bypass of decompression-bomb safeguards when following HTTP redirects (CVE-2026-21441). These flaws could cause denial of service conditions due to resource exhaustion. Red Hat released Satellite 6.16.6.1 with updated packages that fix these issues. The advisory rates the update as Important and recommends applying the update after ensuring all prior errata are applied.
Potential Impact
The vulnerabilities can lead to resource exhaustion on systems running affected versions of Red Hat Satellite due to unbounded decompression chains and improper handling of compressed data in the urllib3 library. This may cause denial of service conditions impacting system availability. There are no known exploits in the wild at this time. The impact is rated as high by the source, but the vendor rates the update as Important, indicating a significant but not critical risk.
Mitigation Recommendations
Red Hat has released updated packages in Red Hat Satellite version 6.16.6.1 that address these vulnerabilities. Users should upgrade to version 6.16.6.1 or later after applying all previously released errata relevant to their system. Follow Red Hat's official update procedures as described in their advisory. No additional mitigations are specified beyond applying the official update.
Red Hat Security Advisory: Satellite 6.16.6.1 Async Update
Description
Red Hat Satellite is a system management solution that allows organizations to configure and maintain their systems without the necessity to provide public Internet access to their servers or other client systems. It performs provisioning and configuration management of predefined standard operating environments. Bug Fix(es): * Clean duplicate erratum packages before bigint migration (6.16) (SAT-41984) Security Fix(es): * python-urllib3: urllib3: Unbounded decompression chain leads to resource exhaustion (CVE-2025-66418) * python-urllib3: urllib3 vulnerable to decompression-bomb safeguard bypass when following HTTP redirects (streaming API) (CVE-2026-21441) * python-urllib3: urllib3 Streaming API improperly handles highly compressed data (CVE-2025-66471) Users of Red Hat Satellite are advised to upgrade to these updated packages, which fix these bugs. 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.
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Red Hat Satellite 6.16 for RHEL 8 and 9 uses python-urllib3, which had vulnerabilities involving unbounded decompression chains leading to resource exhaustion (CVE-2025-66418), improper handling of highly compressed data in the streaming API (CVE-2025-66471), and bypass of decompression-bomb safeguards when following HTTP redirects (CVE-2026-21441). These flaws could cause denial of service conditions due to resource exhaustion. Red Hat released Satellite 6.16.6.1 with updated packages that fix these issues. The advisory rates the update as Important and recommends applying the update after ensuring all prior errata are applied.
Potential Impact
The vulnerabilities can lead to resource exhaustion on systems running affected versions of Red Hat Satellite due to unbounded decompression chains and improper handling of compressed data in the urllib3 library. This may cause denial of service conditions impacting system availability. There are no known exploits in the wild at this time. The impact is rated as high by the source, but the vendor rates the update as Important, indicating a significant but not critical risk.
Mitigation Recommendations
Red Hat has released updated packages in Red Hat Satellite version 6.16.6.1 that address these vulnerabilities. Users should upgrade to version 6.16.6.1 or later after applying all previously released errata relevant to their system. Follow Red Hat's official update procedures as described in their advisory. No additional mitigations are specified beyond applying the official update.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:2765
- Cve Count
- 3
- Additional Cves
- ["CVE-2025-66471","CVE-2026-21441"]
Threat ID: 6a160972e29bf47b5063a960
Added to database: 05/26/2026, 20:58:26 UTC
Last enriched: 08/17/2026, 17:44:18 UTC
Last updated: 09/10/2026, 19:24:57 UTC
Views: 50
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