RHSA-2026:99144: 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-9.9.z] (JIRA:RHEL-302545) 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

81 affected componentsFixes available
redhat/dotnet9.0<9.0.124-1.el9_9
9.0.124-1.el9_9
redhat/aspnetcore-runtime<9.0-9.0.23-1.el9_9
9.0-9.0.23-1.el9_9
redhat/aspnetcore-runtime-dbg<9.0-9.0.23-1.el9_9
9.0-9.0.23-1.el9_9
redhat/aspnetcore-targeting-pack<9.0-9.0.23-1.el9_9
9.0-9.0.23-1.el9_9
redhat/dotnet-apphost-pack<9.0-9.0.23-1.el9_9
9.0-9.0.23-1.el9_9
redhat/dotnet-apphost-pack<9.0-debuginfo-9.0.23-1.el9_9
9.0-debuginfo-9.0.23-1.el9_9
redhat/dotnet-hostfxr<9.0-9.0.23-1.el9_9
9.0-9.0.23-1.el9_9
redhat/dotnet-hostfxr<9.0-debuginfo-9.0.23-1.el9_9
9.0-debuginfo-9.0.23-1.el9_9
redhat/dotnet-runtime<9.0-9.0.23-1.el9_9
9.0-9.0.23-1.el9_9
redhat/dotnet-runtime<9.0-debuginfo-9.0.23-1.el9_9
9.0-debuginfo-9.0.23-1.el9_9
redhat/dotnet-runtime-dbg<9.0-9.0.23-1.el9_9
9.0-9.0.23-1.el9_9
redhat/dotnet-sdk<9.0-9.0.124-1.el9_9
9.0-9.0.124-1.el9_9
redhat/dotnet-sdk<9.0-debuginfo-9.0.124-1.el9_9
9.0-debuginfo-9.0.124-1.el9_9
redhat/dotnet-sdk-aot<9.0-9.0.124-1.el9_9
9.0-9.0.124-1.el9_9
redhat/dotnet-sdk-aot<9.0-debuginfo-9.0.124-1.el9_9
9.0-debuginfo-9.0.124-1.el9_9
redhat/dotnet-sdk-dbg<9.0-9.0.124-1.el9_9
9.0-9.0.124-1.el9_9
redhat/dotnet-targeting-pack<9.0-9.0.23-1.el9_9
9.0-9.0.23-1.el9_9
redhat/dotnet-templates<9.0-9.0.124-1.el9_9
9.0-9.0.124-1.el9_9
redhat/dotnet9.0-debuginfo<9.0.124-1.el9_9
9.0.124-1.el9_9
redhat/dotnet9.0-debugsource<9.0.124-1.el9_9
9.0.124-1.el9_9
redhat/netstandard-targeting-pack<2.1-9.0.124-1.el9_9
2.1-9.0.124-1.el9_9
redhat/aspnetcore-runtime<9.0-9.0.23-1.el9_9
9.0-9.0.23-1.el9_9
redhat/aspnetcore-runtime-dbg<9.0-9.0.23-1.el9_9
9.0-9.0.23-1.el9_9
redhat/aspnetcore-targeting-pack<9.0-9.0.23-1.el9_9
9.0-9.0.23-1.el9_9
redhat/dotnet-apphost-pack<9.0-9.0.23-1.el9_9
9.0-9.0.23-1.el9_9
redhat/dotnet-apphost-pack<9.0-debuginfo-9.0.23-1.el9_9
9.0-debuginfo-9.0.23-1.el9_9
redhat/dotnet-hostfxr<9.0-9.0.23-1.el9_9
9.0-9.0.23-1.el9_9
redhat/dotnet-hostfxr<9.0-debuginfo-9.0.23-1.el9_9
9.0-debuginfo-9.0.23-1.el9_9
redhat/dotnet-runtime<9.0-9.0.23-1.el9_9
9.0-9.0.23-1.el9_9
redhat/dotnet-runtime<9.0-debuginfo-9.0.23-1.el9_9
9.0-debuginfo-9.0.23-1.el9_9
redhat/dotnet-runtime-dbg<9.0-9.0.23-1.el9_9
9.0-9.0.23-1.el9_9
redhat/dotnet-sdk<9.0-9.0.124-1.el9_9
9.0-9.0.124-1.el9_9
redhat/dotnet-sdk<9.0-debuginfo-9.0.124-1.el9_9
9.0-debuginfo-9.0.124-1.el9_9
redhat/dotnet-sdk-dbg<9.0-9.0.124-1.el9_9
9.0-9.0.124-1.el9_9
redhat/dotnet-targeting-pack<9.0-9.0.23-1.el9_9
9.0-9.0.23-1.el9_9
redhat/dotnet-templates<9.0-9.0.124-1.el9_9
9.0-9.0.124-1.el9_9
redhat/dotnet9.0-debuginfo<9.0.124-1.el9_9
9.0.124-1.el9_9
redhat/dotnet9.0-debugsource<9.0.124-1.el9_9
9.0.124-1.el9_9
redhat/netstandard-targeting-pack<2.1-9.0.124-1.el9_9
2.1-9.0.124-1.el9_9
redhat/aspnetcore-runtime<9.0-9.0.23-1.el9_9
9.0-9.0.23-1.el9_9
redhat/aspnetcore-runtime-dbg<9.0-9.0.23-1.el9_9
9.0-9.0.23-1.el9_9
redhat/aspnetcore-targeting-pack<9.0-9.0.23-1.el9_9
9.0-9.0.23-1.el9_9
redhat/dotnet-apphost-pack<9.0-9.0.23-1.el9_9
9.0-9.0.23-1.el9_9
redhat/dotnet-apphost-pack<9.0-debuginfo-9.0.23-1.el9_9
9.0-debuginfo-9.0.23-1.el9_9
redhat/dotnet-hostfxr<9.0-9.0.23-1.el9_9
9.0-9.0.23-1.el9_9
redhat/dotnet-hostfxr<9.0-debuginfo-9.0.23-1.el9_9
9.0-debuginfo-9.0.23-1.el9_9
redhat/dotnet-runtime<9.0-9.0.23-1.el9_9
9.0-9.0.23-1.el9_9
redhat/dotnet-runtime<9.0-debuginfo-9.0.23-1.el9_9
9.0-debuginfo-9.0.23-1.el9_9
redhat/dotnet-runtime-dbg<9.0-9.0.23-1.el9_9
9.0-9.0.23-1.el9_9
redhat/dotnet-sdk<9.0-9.0.124-1.el9_9
9.0-9.0.124-1.el9_9
redhat/dotnet-sdk<9.0-debuginfo-9.0.124-1.el9_9
9.0-debuginfo-9.0.124-1.el9_9
redhat/dotnet-sdk-dbg<9.0-9.0.124-1.el9_9
9.0-9.0.124-1.el9_9
redhat/dotnet-targeting-pack<9.0-9.0.23-1.el9_9
9.0-9.0.23-1.el9_9
redhat/dotnet-templates<9.0-9.0.124-1.el9_9
9.0-9.0.124-1.el9_9
redhat/dotnet9.0-debuginfo<9.0.124-1.el9_9
9.0.124-1.el9_9
redhat/dotnet9.0-debugsource<9.0.124-1.el9_9
9.0.124-1.el9_9
redhat/netstandard-targeting-pack<2.1-9.0.124-1.el9_9
2.1-9.0.124-1.el9_9
redhat/aspnetcore-runtime<9.0-9.0.23-1.el9_9.aa
9.0-9.0.23-1.el9_9.aa
redhat/aspnetcore-runtime-dbg<9.0-9.0.23-1.el9_9.aa
9.0-9.0.23-1.el9_9.aa
redhat/aspnetcore-targeting-pack<9.0-9.0.23-1.el9_9.aa
9.0-9.0.23-1.el9_9.aa
redhat/dotnet-apphost-pack<9.0-9.0.23-1.el9_9.aa
9.0-9.0.23-1.el9_9.aa
redhat/dotnet-apphost-pack<9.0-debuginfo-9.0.23-1.el9_9.aa
9.0-debuginfo-9.0.23-1.el9_9.aa
redhat/dotnet-hostfxr<9.0-9.0.23-1.el9_9.aa
9.0-9.0.23-1.el9_9.aa
redhat/dotnet-hostfxr<9.0-debuginfo-9.0.23-1.el9_9.aa
9.0-debuginfo-9.0.23-1.el9_9.aa
redhat/dotnet-runtime<9.0-9.0.23-1.el9_9.aa
9.0-9.0.23-1.el9_9.aa
redhat/dotnet-runtime<9.0-debuginfo-9.0.23-1.el9_9.aa
9.0-debuginfo-9.0.23-1.el9_9.aa
redhat/dotnet-runtime-dbg<9.0-9.0.23-1.el9_9.aa
9.0-9.0.23-1.el9_9.aa
redhat/dotnet-sdk<9.0-9.0.124-1.el9_9.aa
9.0-9.0.124-1.el9_9.aa
redhat/dotnet-sdk<9.0-debuginfo-9.0.124-1.el9_9.aa
9.0-debuginfo-9.0.124-1.el9_9.aa
redhat/dotnet-sdk-aot<9.0-9.0.124-1.el9_9.aa
9.0-9.0.124-1.el9_9.aa
redhat/dotnet-sdk-aot<9.0-debuginfo-9.0.124-1.el9_9.aa
9.0-debuginfo-9.0.124-1.el9_9.aa
redhat/dotnet-sdk-dbg<9.0-9.0.124-1.el9_9.aa
9.0-9.0.124-1.el9_9.aa
redhat/dotnet-targeting-pack<9.0-9.0.23-1.el9_9.aa
9.0-9.0.23-1.el9_9.aa
redhat/dotnet-templates<9.0-9.0.124-1.el9_9.aa
9.0-9.0.124-1.el9_9.aa
redhat/dotnet9.0-debuginfo<9.0.124-1.el9_9.aa
9.0.124-1.el9_9.aa
redhat/dotnet9.0-debugsource<9.0.124-1.el9_9.aa
9.0.124-1.el9_9.aa
redhat/netstandard-targeting-pack<2.1-9.0.124-1.el9_9.aa
2.1-9.0.124-1.el9_9.aa
redhat/dotnet-sdk<9.0-source-built-artifacts-9.0.124-1.el9_9
9.0-source-built-artifacts-9.0.124-1.el9_9
redhat/dotnet-sdk<9.0-source-built-artifacts-9.0.124-1.el9_9
9.0-source-built-artifacts-9.0.124-1.el9_9
redhat/dotnet-sdk<9.0-source-built-artifacts-9.0.124-1.el9_9.aa
9.0-source-built-artifacts-9.0.124-1.el9_9.aa
redhat/dotnet-sdk<9.0-source-built-artifacts-9.0.124-1.el9_9
9.0-source-built-artifacts-9.0.124-1.el9_9

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.el9_9
  2. Upgrade

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

    Fixed in 9.0-9.0.23-1.el9_9
  3. Upgrade

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

    Fixed in 9.0-9.0.23-1.el9_9
  4. Upgrade

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

    Fixed in 9.0-9.0.23-1.el9_9
  5. Upgrade

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

    Fixed in 9.0-9.0.23-1.el9_9
  6. Upgrade

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

    Fixed in 9.0-debuginfo-9.0.23-1.el9_9
  7. Upgrade

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

    Fixed in 9.0-9.0.23-1.el9_9
  8. Upgrade

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

    Fixed in 9.0-debuginfo-9.0.23-1.el9_9
  9. Upgrade

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

    Fixed in 9.0-9.0.23-1.el9_9
  10. Upgrade

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

    Fixed in 9.0-debuginfo-9.0.23-1.el9_9
  11. Upgrade

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

    Fixed in 9.0-9.0.23-1.el9_9
  12. Upgrade

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

    Fixed in 9.0-9.0.124-1.el9_9
  13. Upgrade

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

    Fixed in 9.0-debuginfo-9.0.124-1.el9_9
  14. Upgrade

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

    Fixed in 9.0-9.0.124-1.el9_9
  15. Upgrade

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

    Fixed in 9.0-debuginfo-9.0.124-1.el9_9
  16. Upgrade

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

    Fixed in 9.0-9.0.124-1.el9_9
  17. Upgrade

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

    Fixed in 9.0-9.0.23-1.el9_9
  18. Upgrade

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

    Fixed in 9.0-9.0.124-1.el9_9
  19. Upgrade

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

    Fixed in 9.0.124-1.el9_9
  20. Upgrade

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

    Fixed in 9.0.124-1.el9_9
  21. Upgrade

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

    Fixed in 2.1-9.0.124-1.el9_9
  22. Upgrade

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

    Fixed in 9.0-9.0.23-1.el9_9.aa
  23. Upgrade

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

    Fixed in 9.0-9.0.23-1.el9_9.aa
  24. Upgrade

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

    Fixed in 9.0-9.0.23-1.el9_9.aa
  25. Upgrade

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

    Fixed in 9.0-9.0.23-1.el9_9.aa
  26. Upgrade

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

    Fixed in 9.0-debuginfo-9.0.23-1.el9_9.aa
  27. Upgrade

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

    Fixed in 9.0-9.0.23-1.el9_9.aa
  28. Upgrade

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

    Fixed in 9.0-debuginfo-9.0.23-1.el9_9.aa
  29. Upgrade

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

    Fixed in 9.0-9.0.23-1.el9_9.aa
  30. Upgrade

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

    Fixed in 9.0-debuginfo-9.0.23-1.el9_9.aa
  31. Upgrade

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

    Fixed in 9.0-9.0.23-1.el9_9.aa
  32. Upgrade

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

    Fixed in 9.0-9.0.124-1.el9_9.aa
  33. Upgrade

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

    Fixed in 9.0-debuginfo-9.0.124-1.el9_9.aa
  34. Upgrade

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

    Fixed in 9.0-9.0.124-1.el9_9.aa
  35. Upgrade

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

    Fixed in 9.0-debuginfo-9.0.124-1.el9_9.aa
  36. Upgrade

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

    Fixed in 9.0-9.0.124-1.el9_9.aa
  37. Upgrade

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

    Fixed in 9.0-9.0.23-1.el9_9.aa
  38. Upgrade

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

    Fixed in 9.0-9.0.124-1.el9_9.aa
  39. Upgrade

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

    Fixed in 9.0.124-1.el9_9.aa
  40. Upgrade

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

    Fixed in 9.0.124-1.el9_9.aa
  41. Upgrade

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

    Fixed in 2.1-9.0.124-1.el9_9.aa
  42. Upgrade

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

    Fixed in 9.0-source-built-artifacts-9.0.124-1.el9_9
  43. Upgrade

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

    Fixed in 9.0-source-built-artifacts-9.0.124-1.el9_9.aa
  44. Upgrade

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

    Fixed in 9.0.124
  45. 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 release streams are covered by the listed security fixes?

The advisory lists affected fixes across .NET 8.0, 9.0, 10.0, and 11.0. The included update specifically identifies .NET 9.0 SDK version 9.0.124 and runtime version 9.0.23.

2

What types of security impact are addressed?

The fixes address ASP.NET Core information disclosure, .NET and ASP.NET Core elevation of privilege, and .NET and ASP.NET Core denial-of-service vulnerabilities.

3

Are applications that use ASP.NET Core specifically relevant?

Yes. Several listed fixes are explicitly for ASP.NET Core, including information disclosure, elevation of privilege, and denial-of-service issues. Systems running ASP.NET Core applications should assess the update alongside systems using the .NET runtime more generally.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203