Red Hat Security Advisory: .NET 9.0 security, bug fix, and enhancement update
.NET is a fast, lightweight and modular platform for creating cross platform applications that work on Linux, macOS and Windows. It particularly focuses on creating console applications, web applications and micro-services. .NET contains a runtime conforming to .NET Standards a set of framework libraries, an SDK containing compilers and a 'dotnet' application to drive everything. SDK version: 9.0.121 Runtime version: 9.0.20 Security Fix(es): * dotnet10.0: dotnet9.0: dotnet8.0: .NET Information Disclosure Vulnerability (CVE-2026-58649) * dotnet10.0: dotnet9.0: .NET Elevation of Privilege Vulnerability (CVE-2026-69806) Bug Fix(es) and Enhancement(s): * Update .NET 9.0 to SDK 9.0.121 and Runtime 9.0.20 [rhel-10.2.z] (JIRA:RHEL-252279) 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
This advisory addresses two security vulnerabilities in .NET versions 8.0, 9.0, and 10.0 on Red Hat Enterprise Linux 10. CVE-2026-58649 is an information disclosure vulnerability, and CVE-2026-69806 is an elevation of privilege vulnerability. Red Hat has released an update upgrading .NET to SDK 9.0.121 and runtime 9.0.20 to fix these issues. The advisory covers multiple architectures and product variants of Red Hat Enterprise Linux 10. The update is classified as important, and users are directed to apply the update as per Red Hat's guidance. No CVSS score is provided in the advisory, and no active exploitation has been reported.
Potential Impact
Successful exploitation of CVE-2026-58649 could lead to unauthorized disclosure of information, while CVE-2026-69806 could allow an attacker to elevate privileges on the affected system. These vulnerabilities affect .NET runtime and SDK components on Red Hat Enterprise Linux 10. The overall security impact is rated as important by Red Hat. There are no reports of known exploits in the wild at this time.
Mitigation Recommendations
Red Hat has released an official update for .NET 9.0 that includes SDK version 9.0.121 and runtime version 9.0.20 which address these vulnerabilities. Users should apply the update promptly following Red Hat's published instructions at https://access.redhat.com/articles/11258. No additional mitigation actions are indicated by the vendor advisory.
Red Hat Security Advisory: .NET 9.0 security, bug fix, and enhancement update
Description
.NET is a fast, lightweight and modular platform for creating cross platform applications that work on Linux, macOS and Windows. It particularly focuses on creating console applications, web applications and micro-services. .NET contains a runtime conforming to .NET Standards a set of framework libraries, an SDK containing compilers and a 'dotnet' application to drive everything. SDK version: 9.0.121 Runtime version: 9.0.20 Security Fix(es): * dotnet10.0: dotnet9.0: dotnet8.0: .NET Information Disclosure Vulnerability (CVE-2026-58649) * dotnet10.0: dotnet9.0: .NET Elevation of Privilege Vulnerability (CVE-2026-69806) Bug Fix(es) and Enhancement(s): * Update .NET 9.0 to SDK 9.0.121 and Runtime 9.0.20 [rhel-10.2.z] (JIRA:RHEL-252279) 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
This advisory addresses two security vulnerabilities in .NET versions 8.0, 9.0, and 10.0 on Red Hat Enterprise Linux 10. CVE-2026-58649 is an information disclosure vulnerability, and CVE-2026-69806 is an elevation of privilege vulnerability. Red Hat has released an update upgrading .NET to SDK 9.0.121 and runtime 9.0.20 to fix these issues. The advisory covers multiple architectures and product variants of Red Hat Enterprise Linux 10. The update is classified as important, and users are directed to apply the update as per Red Hat's guidance. No CVSS score is provided in the advisory, and no active exploitation has been reported.
Potential Impact
Successful exploitation of CVE-2026-58649 could lead to unauthorized disclosure of information, while CVE-2026-69806 could allow an attacker to elevate privileges on the affected system. These vulnerabilities affect .NET runtime and SDK components on Red Hat Enterprise Linux 10. The overall security impact is rated as important by Red Hat. There are no reports of known exploits in the wild at this time.
Mitigation Recommendations
Red Hat has released an official update for .NET 9.0 that includes SDK version 9.0.121 and runtime version 9.0.20 which address these vulnerabilities. Users should apply the update promptly following Red Hat's published instructions at https://access.redhat.com/articles/11258. No additional mitigation actions are indicated by the vendor advisory.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:67528
- Cve Count
- 2
- Additional Cves
- ["CVE-2026-69806"]
- State
- PUBLISHED
Threat ID: 6aaa07ba55bf5e2cf5e88cce
Added to database: 09/16/2026, 03:06:34 UTC
Last enriched: 09/16/2026, 03:13:49 UTC
Last updated: 09/16/2026, 04:01:22 UTC
Views: 3
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