RHSA-2026:99051: 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 (JIRA:RHEL-302540) 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.

Other sources

Important: .NET 9.0 security, bug fix, and enhancement update

— Red Hat

Affected Software

85 affected componentsFixes available
Red Hat Red Hat CodeReady Linux Builder for ARM 64
Red Hat Red Hat CodeReady Linux Builder for Power, little endian
Red Hat Red Hat CodeReady Linux Builder for IBM z Systems
Red Hat Red Hat CodeReady Linux Builder for x86_64
redhat/dotnet9.0<9.0.124-1.el8_10
9.0.124-1.el8_10
redhat/aspnetcore-runtime<9.0-9.0.23-1.el8_10
9.0-9.0.23-1.el8_10
redhat/aspnetcore-runtime-dbg<9.0-9.0.23-1.el8_10
9.0-9.0.23-1.el8_10
redhat/aspnetcore-targeting-pack<9.0-9.0.23-1.el8_10
9.0-9.0.23-1.el8_10
redhat/dotnet-apphost-pack<9.0-9.0.23-1.el8_10
9.0-9.0.23-1.el8_10
redhat/dotnet-apphost-pack<9.0-debuginfo-9.0.23-1.el8_10
9.0-debuginfo-9.0.23-1.el8_10
redhat/dotnet-hostfxr<9.0-9.0.23-1.el8_10
9.0-9.0.23-1.el8_10
redhat/dotnet-hostfxr<9.0-debuginfo-9.0.23-1.el8_10
9.0-debuginfo-9.0.23-1.el8_10
redhat/dotnet-runtime<9.0-9.0.23-1.el8_10
9.0-9.0.23-1.el8_10
redhat/dotnet-runtime<9.0-debuginfo-9.0.23-1.el8_10
9.0-debuginfo-9.0.23-1.el8_10
redhat/dotnet-runtime-dbg<9.0-9.0.23-1.el8_10
9.0-9.0.23-1.el8_10
redhat/dotnet-sdk<9.0-9.0.124-1.el8_10
9.0-9.0.124-1.el8_10
redhat/dotnet-sdk<9.0-debuginfo-9.0.124-1.el8_10
9.0-debuginfo-9.0.124-1.el8_10
redhat/dotnet-sdk-aot<9.0-9.0.124-1.el8_10
9.0-9.0.124-1.el8_10
redhat/dotnet-sdk-aot<9.0-debuginfo-9.0.124-1.el8_10
9.0-debuginfo-9.0.124-1.el8_10
redhat/dotnet-sdk-dbg<9.0-9.0.124-1.el8_10
9.0-9.0.124-1.el8_10
redhat/dotnet-targeting-pack<9.0-9.0.23-1.el8_10
9.0-9.0.23-1.el8_10
redhat/dotnet-templates<9.0-9.0.124-1.el8_10
9.0-9.0.124-1.el8_10
redhat/dotnet9.0-debuginfo<9.0.124-1.el8_10
9.0.124-1.el8_10
redhat/dotnet9.0-debugsource<9.0.124-1.el8_10
9.0.124-1.el8_10
redhat/netstandard-targeting-pack<2.1-9.0.124-1.el8_10
2.1-9.0.124-1.el8_10
redhat/aspnetcore-runtime<9.0-9.0.23-1.el8_10
9.0-9.0.23-1.el8_10
redhat/aspnetcore-runtime-dbg<9.0-9.0.23-1.el8_10
9.0-9.0.23-1.el8_10
redhat/aspnetcore-targeting-pack<9.0-9.0.23-1.el8_10
9.0-9.0.23-1.el8_10
redhat/dotnet-apphost-pack<9.0-9.0.23-1.el8_10
9.0-9.0.23-1.el8_10
redhat/dotnet-apphost-pack<9.0-debuginfo-9.0.23-1.el8_10
9.0-debuginfo-9.0.23-1.el8_10
redhat/dotnet-hostfxr<9.0-9.0.23-1.el8_10
9.0-9.0.23-1.el8_10
redhat/dotnet-hostfxr<9.0-debuginfo-9.0.23-1.el8_10
9.0-debuginfo-9.0.23-1.el8_10
redhat/dotnet-runtime<9.0-9.0.23-1.el8_10
9.0-9.0.23-1.el8_10
redhat/dotnet-runtime<9.0-debuginfo-9.0.23-1.el8_10
9.0-debuginfo-9.0.23-1.el8_10
redhat/dotnet-runtime-dbg<9.0-9.0.23-1.el8_10
9.0-9.0.23-1.el8_10
redhat/dotnet-sdk<9.0-9.0.124-1.el8_10
9.0-9.0.124-1.el8_10
redhat/dotnet-sdk<9.0-debuginfo-9.0.124-1.el8_10
9.0-debuginfo-9.0.124-1.el8_10
redhat/dotnet-sdk-dbg<9.0-9.0.124-1.el8_10
9.0-9.0.124-1.el8_10
redhat/dotnet-targeting-pack<9.0-9.0.23-1.el8_10
9.0-9.0.23-1.el8_10
redhat/dotnet-templates<9.0-9.0.124-1.el8_10
9.0-9.0.124-1.el8_10
redhat/dotnet9.0-debuginfo<9.0.124-1.el8_10
9.0.124-1.el8_10
redhat/dotnet9.0-debugsource<9.0.124-1.el8_10
9.0.124-1.el8_10
redhat/netstandard-targeting-pack<2.1-9.0.124-1.el8_10
2.1-9.0.124-1.el8_10
redhat/aspnetcore-runtime<9.0-9.0.23-1.el8_10
9.0-9.0.23-1.el8_10
redhat/aspnetcore-runtime-dbg<9.0-9.0.23-1.el8_10
9.0-9.0.23-1.el8_10
redhat/aspnetcore-targeting-pack<9.0-9.0.23-1.el8_10
9.0-9.0.23-1.el8_10
redhat/dotnet-apphost-pack<9.0-9.0.23-1.el8_10
9.0-9.0.23-1.el8_10
redhat/dotnet-apphost-pack<9.0-debuginfo-9.0.23-1.el8_10
9.0-debuginfo-9.0.23-1.el8_10
redhat/dotnet-hostfxr<9.0-9.0.23-1.el8_10
9.0-9.0.23-1.el8_10
redhat/dotnet-hostfxr<9.0-debuginfo-9.0.23-1.el8_10
9.0-debuginfo-9.0.23-1.el8_10
redhat/dotnet-runtime<9.0-9.0.23-1.el8_10
9.0-9.0.23-1.el8_10
redhat/dotnet-runtime<9.0-debuginfo-9.0.23-1.el8_10
9.0-debuginfo-9.0.23-1.el8_10
redhat/dotnet-runtime-dbg<9.0-9.0.23-1.el8_10
9.0-9.0.23-1.el8_10
redhat/dotnet-sdk<9.0-9.0.124-1.el8_10
9.0-9.0.124-1.el8_10
redhat/dotnet-sdk<9.0-debuginfo-9.0.124-1.el8_10
9.0-debuginfo-9.0.124-1.el8_10
redhat/dotnet-sdk-dbg<9.0-9.0.124-1.el8_10
9.0-9.0.124-1.el8_10
redhat/dotnet-targeting-pack<9.0-9.0.23-1.el8_10
9.0-9.0.23-1.el8_10
redhat/dotnet-templates<9.0-9.0.124-1.el8_10
9.0-9.0.124-1.el8_10
redhat/dotnet9.0-debuginfo<9.0.124-1.el8_10
9.0.124-1.el8_10
redhat/dotnet9.0-debugsource<9.0.124-1.el8_10
9.0.124-1.el8_10
redhat/netstandard-targeting-pack<2.1-9.0.124-1.el8_10
2.1-9.0.124-1.el8_10
redhat/aspnetcore-runtime<9.0-9.0.23-1.el8_10.aa
9.0-9.0.23-1.el8_10.aa
redhat/aspnetcore-runtime-dbg<9.0-9.0.23-1.el8_10.aa
9.0-9.0.23-1.el8_10.aa
redhat/aspnetcore-targeting-pack<9.0-9.0.23-1.el8_10.aa
9.0-9.0.23-1.el8_10.aa
redhat/dotnet-apphost-pack<9.0-9.0.23-1.el8_10.aa
9.0-9.0.23-1.el8_10.aa
redhat/dotnet-apphost-pack<9.0-debuginfo-9.0.23-1.el8_10.aa
9.0-debuginfo-9.0.23-1.el8_10.aa
redhat/dotnet-hostfxr<9.0-9.0.23-1.el8_10.aa
9.0-9.0.23-1.el8_10.aa
redhat/dotnet-hostfxr<9.0-debuginfo-9.0.23-1.el8_10.aa
9.0-debuginfo-9.0.23-1.el8_10.aa
redhat/dotnet-runtime<9.0-9.0.23-1.el8_10.aa
9.0-9.0.23-1.el8_10.aa
redhat/dotnet-runtime<9.0-debuginfo-9.0.23-1.el8_10.aa
9.0-debuginfo-9.0.23-1.el8_10.aa
redhat/dotnet-runtime-dbg<9.0-9.0.23-1.el8_10.aa
9.0-9.0.23-1.el8_10.aa
redhat/dotnet-sdk<9.0-9.0.124-1.el8_10.aa
9.0-9.0.124-1.el8_10.aa
redhat/dotnet-sdk<9.0-debuginfo-9.0.124-1.el8_10.aa
9.0-debuginfo-9.0.124-1.el8_10.aa
redhat/dotnet-sdk-aot<9.0-9.0.124-1.el8_10.aa
9.0-9.0.124-1.el8_10.aa
redhat/dotnet-sdk-aot<9.0-debuginfo-9.0.124-1.el8_10.aa
9.0-debuginfo-9.0.124-1.el8_10.aa
redhat/dotnet-sdk-dbg<9.0-9.0.124-1.el8_10.aa
9.0-9.0.124-1.el8_10.aa
redhat/dotnet-targeting-pack<9.0-9.0.23-1.el8_10.aa
9.0-9.0.23-1.el8_10.aa
redhat/dotnet-templates<9.0-9.0.124-1.el8_10.aa
9.0-9.0.124-1.el8_10.aa
redhat/dotnet9.0-debuginfo<9.0.124-1.el8_10.aa
9.0.124-1.el8_10.aa
redhat/dotnet9.0-debugsource<9.0.124-1.el8_10.aa
9.0.124-1.el8_10.aa
redhat/netstandard-targeting-pack<2.1-9.0.124-1.el8_10.aa
2.1-9.0.124-1.el8_10.aa
redhat/dotnet-sdk<9.0-source-built-artifacts-9.0.124-1.el8_10
9.0-source-built-artifacts-9.0.124-1.el8_10
redhat/dotnet-sdk<9.0-source-built-artifacts-9.0.124-1.el8_10
9.0-source-built-artifacts-9.0.124-1.el8_10
redhat/dotnet-sdk<9.0-source-built-artifacts-9.0.124-1.el8_10.aa
9.0-source-built-artifacts-9.0.124-1.el8_10.aa
redhat/dotnet-sdk<9.0-source-built-artifacts-9.0.124-1.el8_10
9.0-source-built-artifacts-9.0.124-1.el8_10

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.el8_10
  2. Upgrade

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

    Fixed in 9.0-9.0.23-1.el8_10
  3. Upgrade

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

    Fixed in 9.0-9.0.23-1.el8_10
  4. Upgrade

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

    Fixed in 9.0-9.0.23-1.el8_10
  5. Upgrade

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

    Fixed in 9.0-9.0.23-1.el8_10
  6. Upgrade

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

    Fixed in 9.0-debuginfo-9.0.23-1.el8_10
  7. Upgrade

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

    Fixed in 9.0-9.0.23-1.el8_10
  8. Upgrade

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

    Fixed in 9.0-debuginfo-9.0.23-1.el8_10
  9. Upgrade

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

    Fixed in 9.0-9.0.23-1.el8_10
  10. Upgrade

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

    Fixed in 9.0-debuginfo-9.0.23-1.el8_10
  11. Upgrade

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

    Fixed in 9.0-9.0.23-1.el8_10
  12. Upgrade

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

    Fixed in 9.0-9.0.124-1.el8_10
  13. Upgrade

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

    Fixed in 9.0-debuginfo-9.0.124-1.el8_10
  14. Upgrade

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

    Fixed in 9.0-9.0.124-1.el8_10
  15. Upgrade

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

    Fixed in 9.0-debuginfo-9.0.124-1.el8_10
  16. Upgrade

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

    Fixed in 9.0-9.0.124-1.el8_10
  17. Upgrade

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

    Fixed in 9.0-9.0.23-1.el8_10
  18. Upgrade

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

    Fixed in 9.0-9.0.124-1.el8_10
  19. Upgrade

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

    Fixed in 9.0.124-1.el8_10
  20. Upgrade

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

    Fixed in 9.0.124-1.el8_10
  21. Upgrade

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

    Fixed in 2.1-9.0.124-1.el8_10
  22. Upgrade

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

    Fixed in 9.0-9.0.23-1.el8_10.aa
  23. Upgrade

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

    Fixed in 9.0-9.0.23-1.el8_10.aa
  24. Upgrade

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

    Fixed in 9.0-9.0.23-1.el8_10.aa
  25. Upgrade

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

    Fixed in 9.0-9.0.23-1.el8_10.aa
  26. Upgrade

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

    Fixed in 9.0-debuginfo-9.0.23-1.el8_10.aa
  27. Upgrade

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

    Fixed in 9.0-9.0.23-1.el8_10.aa
  28. Upgrade

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

    Fixed in 9.0-debuginfo-9.0.23-1.el8_10.aa
  29. Upgrade

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

    Fixed in 9.0-9.0.23-1.el8_10.aa
  30. Upgrade

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

    Fixed in 9.0-debuginfo-9.0.23-1.el8_10.aa
  31. Upgrade

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

    Fixed in 9.0-9.0.23-1.el8_10.aa
  32. Upgrade

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

    Fixed in 9.0-9.0.124-1.el8_10.aa
  33. Upgrade

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

    Fixed in 9.0-debuginfo-9.0.124-1.el8_10.aa
  34. Upgrade

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

    Fixed in 9.0-9.0.124-1.el8_10.aa
  35. Upgrade

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

    Fixed in 9.0-debuginfo-9.0.124-1.el8_10.aa
  36. Upgrade

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

    Fixed in 9.0-9.0.124-1.el8_10.aa
  37. Upgrade

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

    Fixed in 9.0-9.0.23-1.el8_10.aa
  38. Upgrade

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

    Fixed in 9.0-9.0.124-1.el8_10.aa
  39. Upgrade

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

    Fixed in 9.0.124-1.el8_10.aa
  40. Upgrade

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

    Fixed in 9.0.124-1.el8_10.aa
  41. Upgrade

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

    Fixed in 2.1-9.0.124-1.el8_10.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.el8_10
  43. Upgrade

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

    Fixed in 9.0-source-built-artifacts-9.0.124-1.el8_10.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
Advisory Published
via Red Hat·04:32 PM
Data Sourced
via Red Hat·04:32 PM
Severity

Company

Resources

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