RHSA-2026:99145: Important: .NET 9.0 security, bug fix, and enhancement update

Published Nov 11, 2026
·
Updated

.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: 9.0.124Runtime version: 9.0.23Security Fix(es): dotnet8.0: dotnet11.0: dotnet9.0: dotnet10.0: ASP.NET Core Information Disclosure Vulnerability (CVE-2026-109476) dotnet11.0: dotnet10.0: dotnet9.0: dotnet8.0: .NET Elevation of Privilege Vulnerability (CVE-2026-105544) dotnet8.0: dotnet9.0: dotnet11.0: dotnet10.0: .NET Denial of Service Vulnerability (CVE-2026-109475) dotnet9.0: dotnet11.0: dotnet10.0: dotnet8.0: dotnet: ASP.NET Core Elevation of Privilege Vulnerability (CVE-2026-114146) dotnet11.0: dotnet8.0: dotnet9.0: dotnet10.0: ASP.NET Core Denial of Service Vulnerability (CVE-2026-114147) dotnet11.0: dotnet8.0: dotnet9.0: dotnet10.0: ASP.NET Core Denial of Service Vulnerability (CVE-2026-114149) Bug Fix(es) and Enhancement(s): Update .NET 9.0 to SDK 9.0.124 and Runtime 9.0.23 [rhel-10.3.z] (JIRA:RHEL-302546) 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

77 affected componentsFixes available
redhat/dotnet9.0<9.0.124-1.el10_3
9.0.124-1.el10_3
redhat/aspnetcore-runtime<9.0-9.0.23-1.el10_3
9.0-9.0.23-1.el10_3
redhat/aspnetcore-runtime-dbg<9.0-9.0.23-1.el10_3
9.0-9.0.23-1.el10_3
redhat/aspnetcore-targeting-pack<9.0-9.0.23-1.el10_3
9.0-9.0.23-1.el10_3
redhat/dotnet-apphost-pack<9.0-9.0.23-1.el10_3
9.0-9.0.23-1.el10_3
redhat/dotnet-apphost-pack<9.0-debuginfo-9.0.23-1.el10_3
9.0-debuginfo-9.0.23-1.el10_3
redhat/dotnet-hostfxr<9.0-9.0.23-1.el10_3
9.0-9.0.23-1.el10_3
redhat/dotnet-hostfxr<9.0-debuginfo-9.0.23-1.el10_3
9.0-debuginfo-9.0.23-1.el10_3
redhat/dotnet-runtime<9.0-9.0.23-1.el10_3
9.0-9.0.23-1.el10_3
redhat/dotnet-runtime<9.0-debuginfo-9.0.23-1.el10_3
9.0-debuginfo-9.0.23-1.el10_3
redhat/dotnet-runtime-dbg<9.0-9.0.23-1.el10_3
9.0-9.0.23-1.el10_3
redhat/dotnet-sdk<9.0-9.0.124-1.el10_3
9.0-9.0.124-1.el10_3
redhat/dotnet-sdk<9.0-debuginfo-9.0.124-1.el10_3
9.0-debuginfo-9.0.124-1.el10_3
redhat/dotnet-sdk-aot<9.0-9.0.124-1.el10_3
9.0-9.0.124-1.el10_3
redhat/dotnet-sdk-aot<9.0-debuginfo-9.0.124-1.el10_3
9.0-debuginfo-9.0.124-1.el10_3
redhat/dotnet-sdk-dbg<9.0-9.0.124-1.el10_3
9.0-9.0.124-1.el10_3
redhat/dotnet-targeting-pack<9.0-9.0.23-1.el10_3
9.0-9.0.23-1.el10_3
redhat/dotnet-templates<9.0-9.0.124-1.el10_3
9.0-9.0.124-1.el10_3
redhat/dotnet9.0-debugsource<9.0.124-1.el10_3
9.0.124-1.el10_3
redhat/netstandard-targeting-pack<2.1-9.0.124-1.el10_3
2.1-9.0.124-1.el10_3
redhat/aspnetcore-runtime<9.0-9.0.23-1.el10_3
9.0-9.0.23-1.el10_3
redhat/aspnetcore-runtime-dbg<9.0-9.0.23-1.el10_3
9.0-9.0.23-1.el10_3
redhat/aspnetcore-targeting-pack<9.0-9.0.23-1.el10_3
9.0-9.0.23-1.el10_3
redhat/dotnet-apphost-pack<9.0-9.0.23-1.el10_3
9.0-9.0.23-1.el10_3
redhat/dotnet-apphost-pack<9.0-debuginfo-9.0.23-1.el10_3
9.0-debuginfo-9.0.23-1.el10_3
redhat/dotnet-hostfxr<9.0-9.0.23-1.el10_3
9.0-9.0.23-1.el10_3
redhat/dotnet-hostfxr<9.0-debuginfo-9.0.23-1.el10_3
9.0-debuginfo-9.0.23-1.el10_3
redhat/dotnet-runtime<9.0-9.0.23-1.el10_3
9.0-9.0.23-1.el10_3
redhat/dotnet-runtime<9.0-debuginfo-9.0.23-1.el10_3
9.0-debuginfo-9.0.23-1.el10_3
redhat/dotnet-runtime-dbg<9.0-9.0.23-1.el10_3
9.0-9.0.23-1.el10_3
redhat/dotnet-sdk<9.0-9.0.124-1.el10_3
9.0-9.0.124-1.el10_3
redhat/dotnet-sdk<9.0-debuginfo-9.0.124-1.el10_3
9.0-debuginfo-9.0.124-1.el10_3
redhat/dotnet-sdk-dbg<9.0-9.0.124-1.el10_3
9.0-9.0.124-1.el10_3
redhat/dotnet-targeting-pack<9.0-9.0.23-1.el10_3
9.0-9.0.23-1.el10_3
redhat/dotnet-templates<9.0-9.0.124-1.el10_3
9.0-9.0.124-1.el10_3
redhat/dotnet9.0-debugsource<9.0.124-1.el10_3
9.0.124-1.el10_3
redhat/netstandard-targeting-pack<2.1-9.0.124-1.el10_3
2.1-9.0.124-1.el10_3
redhat/aspnetcore-runtime<9.0-9.0.23-1.el10_3
9.0-9.0.23-1.el10_3
redhat/aspnetcore-runtime-dbg<9.0-9.0.23-1.el10_3
9.0-9.0.23-1.el10_3
redhat/aspnetcore-targeting-pack<9.0-9.0.23-1.el10_3
9.0-9.0.23-1.el10_3
redhat/dotnet-apphost-pack<9.0-9.0.23-1.el10_3
9.0-9.0.23-1.el10_3
redhat/dotnet-apphost-pack<9.0-debuginfo-9.0.23-1.el10_3
9.0-debuginfo-9.0.23-1.el10_3
redhat/dotnet-hostfxr<9.0-9.0.23-1.el10_3
9.0-9.0.23-1.el10_3
redhat/dotnet-hostfxr<9.0-debuginfo-9.0.23-1.el10_3
9.0-debuginfo-9.0.23-1.el10_3
redhat/dotnet-runtime<9.0-9.0.23-1.el10_3
9.0-9.0.23-1.el10_3
redhat/dotnet-runtime<9.0-debuginfo-9.0.23-1.el10_3
9.0-debuginfo-9.0.23-1.el10_3
redhat/dotnet-runtime-dbg<9.0-9.0.23-1.el10_3
9.0-9.0.23-1.el10_3
redhat/dotnet-sdk<9.0-9.0.124-1.el10_3
9.0-9.0.124-1.el10_3
redhat/dotnet-sdk<9.0-debuginfo-9.0.124-1.el10_3
9.0-debuginfo-9.0.124-1.el10_3
redhat/dotnet-sdk-dbg<9.0-9.0.124-1.el10_3
9.0-9.0.124-1.el10_3
redhat/dotnet-targeting-pack<9.0-9.0.23-1.el10_3
9.0-9.0.23-1.el10_3
redhat/dotnet-templates<9.0-9.0.124-1.el10_3
9.0-9.0.124-1.el10_3
redhat/dotnet9.0-debugsource<9.0.124-1.el10_3
9.0.124-1.el10_3
redhat/netstandard-targeting-pack<2.1-9.0.124-1.el10_3
2.1-9.0.124-1.el10_3
redhat/aspnetcore-runtime<9.0-9.0.23-1.el10_3.aa
9.0-9.0.23-1.el10_3.aa
redhat/aspnetcore-runtime-dbg<9.0-9.0.23-1.el10_3.aa
9.0-9.0.23-1.el10_3.aa
redhat/aspnetcore-targeting-pack<9.0-9.0.23-1.el10_3.aa
9.0-9.0.23-1.el10_3.aa
redhat/dotnet-apphost-pack<9.0-9.0.23-1.el10_3.aa
9.0-9.0.23-1.el10_3.aa
redhat/dotnet-apphost-pack<9.0-debuginfo-9.0.23-1.el10_3.aa
9.0-debuginfo-9.0.23-1.el10_3.aa
redhat/dotnet-hostfxr<9.0-9.0.23-1.el10_3.aa
9.0-9.0.23-1.el10_3.aa
redhat/dotnet-hostfxr<9.0-debuginfo-9.0.23-1.el10_3.aa
9.0-debuginfo-9.0.23-1.el10_3.aa
redhat/dotnet-runtime<9.0-9.0.23-1.el10_3.aa
9.0-9.0.23-1.el10_3.aa
redhat/dotnet-runtime<9.0-debuginfo-9.0.23-1.el10_3.aa
9.0-debuginfo-9.0.23-1.el10_3.aa
redhat/dotnet-runtime-dbg<9.0-9.0.23-1.el10_3.aa
9.0-9.0.23-1.el10_3.aa
redhat/dotnet-sdk<9.0-9.0.124-1.el10_3.aa
9.0-9.0.124-1.el10_3.aa
redhat/dotnet-sdk<9.0-debuginfo-9.0.124-1.el10_3.aa
9.0-debuginfo-9.0.124-1.el10_3.aa
redhat/dotnet-sdk-aot<9.0-9.0.124-1.el10_3.aa
9.0-9.0.124-1.el10_3.aa
redhat/dotnet-sdk-aot<9.0-debuginfo-9.0.124-1.el10_3.aa
9.0-debuginfo-9.0.124-1.el10_3.aa
redhat/dotnet-sdk-dbg<9.0-9.0.124-1.el10_3.aa
9.0-9.0.124-1.el10_3.aa
redhat/dotnet-targeting-pack<9.0-9.0.23-1.el10_3.aa
9.0-9.0.23-1.el10_3.aa
redhat/dotnet-templates<9.0-9.0.124-1.el10_3.aa
9.0-9.0.124-1.el10_3.aa
redhat/dotnet9.0-debugsource<9.0.124-1.el10_3.aa
9.0.124-1.el10_3.aa
redhat/netstandard-targeting-pack<2.1-9.0.124-1.el10_3.aa
2.1-9.0.124-1.el10_3.aa
redhat/dotnet-sdk<9.0-source-built-artifacts-9.0.124-1.el10_3
9.0-source-built-artifacts-9.0.124-1.el10_3
redhat/dotnet-sdk<9.0-source-built-artifacts-9.0.124-1.el10_3
9.0-source-built-artifacts-9.0.124-1.el10_3
redhat/dotnet-sdk<9.0-source-built-artifacts-9.0.124-1.el10_3.aa
9.0-source-built-artifacts-9.0.124-1.el10_3.aa
redhat/dotnet-sdk<9.0-source-built-artifacts-9.0.124-1.el10_3
9.0-source-built-artifacts-9.0.124-1.el10_3

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/dotnet9.0 to a version that resolves this vulnerability.

    Fixed in 9.0.124-1.el10_3
  2. Upgrade

    Upgrade redhat/aspnetcore-runtime to a version that resolves this vulnerability.

    Fixed in 9.0-9.0.23-1.el10_3
  3. Upgrade

    Upgrade redhat/aspnetcore-runtime-dbg to a version that resolves this vulnerability.

    Fixed in 9.0-9.0.23-1.el10_3
  4. Upgrade

    Upgrade redhat/aspnetcore-targeting-pack to a version that resolves this vulnerability.

    Fixed in 9.0-9.0.23-1.el10_3
  5. Upgrade

    Upgrade redhat/dotnet-apphost-pack to a version that resolves this vulnerability.

    Fixed in 9.0-9.0.23-1.el10_3
  6. Upgrade

    Upgrade redhat/dotnet-apphost-pack to a version that resolves this vulnerability.

    Fixed in 9.0-debuginfo-9.0.23-1.el10_3
  7. Upgrade

    Upgrade redhat/dotnet-hostfxr to a version that resolves this vulnerability.

    Fixed in 9.0-9.0.23-1.el10_3
  8. Upgrade

    Upgrade redhat/dotnet-hostfxr to a version that resolves this vulnerability.

    Fixed in 9.0-debuginfo-9.0.23-1.el10_3
  9. Upgrade

    Upgrade redhat/dotnet-runtime to a version that resolves this vulnerability.

    Fixed in 9.0-9.0.23-1.el10_3
  10. Upgrade

    Upgrade redhat/dotnet-runtime to a version that resolves this vulnerability.

    Fixed in 9.0-debuginfo-9.0.23-1.el10_3
  11. Upgrade

    Upgrade redhat/dotnet-runtime-dbg to a version that resolves this vulnerability.

    Fixed in 9.0-9.0.23-1.el10_3
  12. Upgrade

    Upgrade redhat/dotnet-sdk to a version that resolves this vulnerability.

    Fixed in 9.0-9.0.124-1.el10_3
  13. Upgrade

    Upgrade redhat/dotnet-sdk to a version that resolves this vulnerability.

    Fixed in 9.0-debuginfo-9.0.124-1.el10_3
  14. Upgrade

    Upgrade redhat/dotnet-sdk-aot to a version that resolves this vulnerability.

    Fixed in 9.0-9.0.124-1.el10_3
  15. Upgrade

    Upgrade redhat/dotnet-sdk-aot to a version that resolves this vulnerability.

    Fixed in 9.0-debuginfo-9.0.124-1.el10_3
  16. Upgrade

    Upgrade redhat/dotnet-sdk-dbg to a version that resolves this vulnerability.

    Fixed in 9.0-9.0.124-1.el10_3
  17. Upgrade

    Upgrade redhat/dotnet-targeting-pack to a version that resolves this vulnerability.

    Fixed in 9.0-9.0.23-1.el10_3
  18. Upgrade

    Upgrade redhat/dotnet-templates to a version that resolves this vulnerability.

    Fixed in 9.0-9.0.124-1.el10_3
  19. Upgrade

    Upgrade redhat/dotnet9.0-debugsource to a version that resolves this vulnerability.

    Fixed in 9.0.124-1.el10_3
  20. Upgrade

    Upgrade redhat/netstandard-targeting-pack to a version that resolves this vulnerability.

    Fixed in 2.1-9.0.124-1.el10_3
  21. Upgrade

    Upgrade redhat/aspnetcore-runtime to a version that resolves this vulnerability.

    Fixed in 9.0-9.0.23-1.el10_3.aa
  22. Upgrade

    Upgrade redhat/aspnetcore-runtime-dbg to a version that resolves this vulnerability.

    Fixed in 9.0-9.0.23-1.el10_3.aa
  23. Upgrade

    Upgrade redhat/aspnetcore-targeting-pack to a version that resolves this vulnerability.

    Fixed in 9.0-9.0.23-1.el10_3.aa
  24. Upgrade

    Upgrade redhat/dotnet-apphost-pack to a version that resolves this vulnerability.

    Fixed in 9.0-9.0.23-1.el10_3.aa
  25. Upgrade

    Upgrade redhat/dotnet-apphost-pack to a version that resolves this vulnerability.

    Fixed in 9.0-debuginfo-9.0.23-1.el10_3.aa
  26. Upgrade

    Upgrade redhat/dotnet-hostfxr to a version that resolves this vulnerability.

    Fixed in 9.0-9.0.23-1.el10_3.aa
  27. Upgrade

    Upgrade redhat/dotnet-hostfxr to a version that resolves this vulnerability.

    Fixed in 9.0-debuginfo-9.0.23-1.el10_3.aa
  28. Upgrade

    Upgrade redhat/dotnet-runtime to a version that resolves this vulnerability.

    Fixed in 9.0-9.0.23-1.el10_3.aa
  29. Upgrade

    Upgrade redhat/dotnet-runtime to a version that resolves this vulnerability.

    Fixed in 9.0-debuginfo-9.0.23-1.el10_3.aa
  30. Upgrade

    Upgrade redhat/dotnet-runtime-dbg to a version that resolves this vulnerability.

    Fixed in 9.0-9.0.23-1.el10_3.aa
  31. Upgrade

    Upgrade redhat/dotnet-sdk to a version that resolves this vulnerability.

    Fixed in 9.0-9.0.124-1.el10_3.aa
  32. Upgrade

    Upgrade redhat/dotnet-sdk to a version that resolves this vulnerability.

    Fixed in 9.0-debuginfo-9.0.124-1.el10_3.aa
  33. Upgrade

    Upgrade redhat/dotnet-sdk-aot to a version that resolves this vulnerability.

    Fixed in 9.0-9.0.124-1.el10_3.aa
  34. Upgrade

    Upgrade redhat/dotnet-sdk-aot to a version that resolves this vulnerability.

    Fixed in 9.0-debuginfo-9.0.124-1.el10_3.aa
  35. Upgrade

    Upgrade redhat/dotnet-sdk-dbg to a version that resolves this vulnerability.

    Fixed in 9.0-9.0.124-1.el10_3.aa
  36. Upgrade

    Upgrade redhat/dotnet-targeting-pack to a version that resolves this vulnerability.

    Fixed in 9.0-9.0.23-1.el10_3.aa
  37. Upgrade

    Upgrade redhat/dotnet-templates to a version that resolves this vulnerability.

    Fixed in 9.0-9.0.124-1.el10_3.aa
  38. Upgrade

    Upgrade redhat/dotnet9.0-debugsource to a version that resolves this vulnerability.

    Fixed in 9.0.124-1.el10_3.aa
  39. Upgrade

    Upgrade redhat/netstandard-targeting-pack to a version that resolves this vulnerability.

    Fixed in 2.1-9.0.124-1.el10_3.aa
  40. Upgrade

    Upgrade redhat/dotnet-sdk to a version that resolves this vulnerability.

    Fixed in 9.0-source-built-artifacts-9.0.124-1.el10_3
  41. Upgrade

    Upgrade redhat/dotnet-sdk to a version that resolves this vulnerability.

    Fixed in 9.0-source-built-artifacts-9.0.124-1.el10_3.aa
  42. Upgrade

    Upgrade .NET 9.0 SDK to a version that resolves this vulnerability.

    Fixed in 9.0.124
  43. Upgrade

    Upgrade .NET 9.0 Runtime to a version that resolves this vulnerability.

    Fixed in 9.0.23

Event History

Nov 11, 2026
Advisory Published
via Red Hat·12:00 AM
Data Sourced
via Red Hat·12:00 AM
RemedyDescriptionAffected Software

Frequently Asked Questions

1

Which .NET components should be prioritized for this update?

The advisory lists .NET SDK, runtime, hostfxr, apphost pack, ASP.NET Core runtime, targeting pack, and related debug packages. Systems running ASP.NET Core applications should prioritize the ASP.NET Core runtime because the fixes include information disclosure, elevation of privilege, and denial-of-service vulnerabilities.

2

Which vulnerabilities are addressed by this update?

The update addresses CVE-2026-109476 (ASP.NET Core information disclosure), CVE-2026-105544 (.NET elevation of privilege), CVE-2026-109475 (.NET denial of service), CVE-2026-114146 (ASP.NET Core elevation of privilege), and CVE-2026-114147 and CVE-2026-114149 (ASP.NET Core denial of service).

3

What versions should be installed after applying the update?

The advisory updates .NET 9.0 to SDK version 9.0.124 and Runtime version 9.0.23.

Company

Resources

Contact

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