RHSA-2026:54550: Important: .NET 9.0 security, bug fix, and enhancement update

Published Aug 13, 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: 9.0.120Runtime version: 9.0.19Security Fix(es): .NET: .NET Core: .NET Security Feature Bypass Vulnerability (CVE-2026-62899) .NET: .NET Information Disclosure Vulnerability (CVE-2026-62900) .NET: .NET Denial of Service Vulnerability (CVE-2026-62901) .NET: .NET Elevation of Privilege Vulnerability (CVE-2026-62909) Bug Fix(es) and Enhancement(s): Update .NET 9.0 to SDK 9.0.120 and Runtime 9.0.19 (JIRA:RHEL-235473) 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<9.0.120-1.el8_10
9.0.120-1.el8_10
redhat/aspnetcore-runtime<9.0-9.0.19-1.el8_10
9.0-9.0.19-1.el8_10
redhat/aspnetcore-runtime-dbg<9.0-9.0.19-1.el8_10
9.0-9.0.19-1.el8_10
redhat/aspnetcore-targeting-pack<9.0-9.0.19-1.el8_10
9.0-9.0.19-1.el8_10
redhat/dotnet-apphost-pack<9.0-9.0.19-1.el8_10
9.0-9.0.19-1.el8_10
redhat/dotnet-apphost-pack<9.0-debuginfo-9.0.19-1.el8_10
9.0-debuginfo-9.0.19-1.el8_10
redhat/dotnet-hostfxr<9.0-9.0.19-1.el8_10
9.0-9.0.19-1.el8_10
redhat/dotnet-hostfxr<9.0-debuginfo-9.0.19-1.el8_10
9.0-debuginfo-9.0.19-1.el8_10
redhat/dotnet-runtime<9.0-9.0.19-1.el8_10
9.0-9.0.19-1.el8_10
redhat/dotnet-runtime<9.0-debuginfo-9.0.19-1.el8_10
9.0-debuginfo-9.0.19-1.el8_10
redhat/dotnet-runtime-dbg<9.0-9.0.19-1.el8_10
9.0-9.0.19-1.el8_10
redhat/dotnet-sdk<9.0-9.0.120-1.el8_10
9.0-9.0.120-1.el8_10
redhat/dotnet-sdk<9.0-debuginfo-9.0.120-1.el8_10
9.0-debuginfo-9.0.120-1.el8_10
redhat/dotnet-sdk-aot<9.0-9.0.120-1.el8_10
9.0-9.0.120-1.el8_10
redhat/dotnet-sdk-aot<9.0-debuginfo-9.0.120-1.el8_10
9.0-debuginfo-9.0.120-1.el8_10
redhat/dotnet-sdk-dbg<9.0-9.0.120-1.el8_10
9.0-9.0.120-1.el8_10
redhat/dotnet-targeting-pack<9.0-9.0.19-1.el8_10
9.0-9.0.19-1.el8_10
redhat/dotnet-templates<9.0-9.0.120-1.el8_10
9.0-9.0.120-1.el8_10
redhat/dotnet9.0-debuginfo<9.0.120-1.el8_10
9.0.120-1.el8_10
redhat/dotnet9.0-debugsource<9.0.120-1.el8_10
9.0.120-1.el8_10
redhat/netstandard-targeting-pack<2.1-9.0.120-1.el8_10
2.1-9.0.120-1.el8_10
redhat/aspnetcore-runtime<9.0-9.0.19-1.el8_10
9.0-9.0.19-1.el8_10
redhat/aspnetcore-runtime-dbg<9.0-9.0.19-1.el8_10
9.0-9.0.19-1.el8_10
redhat/aspnetcore-targeting-pack<9.0-9.0.19-1.el8_10
9.0-9.0.19-1.el8_10
redhat/dotnet-apphost-pack<9.0-9.0.19-1.el8_10
9.0-9.0.19-1.el8_10
redhat/dotnet-apphost-pack<9.0-debuginfo-9.0.19-1.el8_10
9.0-debuginfo-9.0.19-1.el8_10
redhat/dotnet-hostfxr<9.0-9.0.19-1.el8_10
9.0-9.0.19-1.el8_10
redhat/dotnet-hostfxr<9.0-debuginfo-9.0.19-1.el8_10
9.0-debuginfo-9.0.19-1.el8_10
redhat/dotnet-runtime<9.0-9.0.19-1.el8_10
9.0-9.0.19-1.el8_10
redhat/dotnet-runtime<9.0-debuginfo-9.0.19-1.el8_10
9.0-debuginfo-9.0.19-1.el8_10
redhat/dotnet-runtime-dbg<9.0-9.0.19-1.el8_10
9.0-9.0.19-1.el8_10
redhat/dotnet-sdk<9.0-9.0.120-1.el8_10
9.0-9.0.120-1.el8_10
redhat/dotnet-sdk<9.0-debuginfo-9.0.120-1.el8_10
9.0-debuginfo-9.0.120-1.el8_10
redhat/dotnet-sdk-dbg<9.0-9.0.120-1.el8_10
9.0-9.0.120-1.el8_10
redhat/dotnet-targeting-pack<9.0-9.0.19-1.el8_10
9.0-9.0.19-1.el8_10
redhat/dotnet-templates<9.0-9.0.120-1.el8_10
9.0-9.0.120-1.el8_10
redhat/dotnet9.0-debuginfo<9.0.120-1.el8_10
9.0.120-1.el8_10
redhat/dotnet9.0-debugsource<9.0.120-1.el8_10
9.0.120-1.el8_10
redhat/netstandard-targeting-pack<2.1-9.0.120-1.el8_10
2.1-9.0.120-1.el8_10
redhat/aspnetcore-runtime<9.0-9.0.19-1.el8_10
9.0-9.0.19-1.el8_10
redhat/aspnetcore-runtime-dbg<9.0-9.0.19-1.el8_10
9.0-9.0.19-1.el8_10
redhat/aspnetcore-targeting-pack<9.0-9.0.19-1.el8_10
9.0-9.0.19-1.el8_10
redhat/dotnet-apphost-pack<9.0-9.0.19-1.el8_10
9.0-9.0.19-1.el8_10
redhat/dotnet-apphost-pack<9.0-debuginfo-9.0.19-1.el8_10
9.0-debuginfo-9.0.19-1.el8_10
redhat/dotnet-hostfxr<9.0-9.0.19-1.el8_10
9.0-9.0.19-1.el8_10
redhat/dotnet-hostfxr<9.0-debuginfo-9.0.19-1.el8_10
9.0-debuginfo-9.0.19-1.el8_10
redhat/dotnet-runtime<9.0-9.0.19-1.el8_10
9.0-9.0.19-1.el8_10
redhat/dotnet-runtime<9.0-debuginfo-9.0.19-1.el8_10
9.0-debuginfo-9.0.19-1.el8_10
redhat/dotnet-runtime-dbg<9.0-9.0.19-1.el8_10
9.0-9.0.19-1.el8_10
redhat/dotnet-sdk<9.0-9.0.120-1.el8_10
9.0-9.0.120-1.el8_10
redhat/dotnet-sdk<9.0-debuginfo-9.0.120-1.el8_10
9.0-debuginfo-9.0.120-1.el8_10
redhat/dotnet-sdk-dbg<9.0-9.0.120-1.el8_10
9.0-9.0.120-1.el8_10
redhat/dotnet-targeting-pack<9.0-9.0.19-1.el8_10
9.0-9.0.19-1.el8_10
redhat/dotnet-templates<9.0-9.0.120-1.el8_10
9.0-9.0.120-1.el8_10
redhat/dotnet9.0-debuginfo<9.0.120-1.el8_10
9.0.120-1.el8_10
redhat/dotnet9.0-debugsource<9.0.120-1.el8_10
9.0.120-1.el8_10
redhat/netstandard-targeting-pack<2.1-9.0.120-1.el8_10
2.1-9.0.120-1.el8_10
redhat/aspnetcore-runtime<9.0-9.0.19-1.el8_10.aa
9.0-9.0.19-1.el8_10.aa
redhat/aspnetcore-runtime-dbg<9.0-9.0.19-1.el8_10.aa
9.0-9.0.19-1.el8_10.aa
redhat/aspnetcore-targeting-pack<9.0-9.0.19-1.el8_10.aa
9.0-9.0.19-1.el8_10.aa
redhat/dotnet-apphost-pack<9.0-9.0.19-1.el8_10.aa
9.0-9.0.19-1.el8_10.aa
redhat/dotnet-apphost-pack<9.0-debuginfo-9.0.19-1.el8_10.aa
9.0-debuginfo-9.0.19-1.el8_10.aa
redhat/dotnet-hostfxr<9.0-9.0.19-1.el8_10.aa
9.0-9.0.19-1.el8_10.aa
redhat/dotnet-hostfxr<9.0-debuginfo-9.0.19-1.el8_10.aa
9.0-debuginfo-9.0.19-1.el8_10.aa
redhat/dotnet-runtime<9.0-9.0.19-1.el8_10.aa
9.0-9.0.19-1.el8_10.aa
redhat/dotnet-runtime<9.0-debuginfo-9.0.19-1.el8_10.aa
9.0-debuginfo-9.0.19-1.el8_10.aa
redhat/dotnet-runtime-dbg<9.0-9.0.19-1.el8_10.aa
9.0-9.0.19-1.el8_10.aa
redhat/dotnet-sdk<9.0-9.0.120-1.el8_10.aa
9.0-9.0.120-1.el8_10.aa
redhat/dotnet-sdk<9.0-debuginfo-9.0.120-1.el8_10.aa
9.0-debuginfo-9.0.120-1.el8_10.aa
redhat/dotnet-sdk-aot<9.0-9.0.120-1.el8_10.aa
9.0-9.0.120-1.el8_10.aa
redhat/dotnet-sdk-aot<9.0-debuginfo-9.0.120-1.el8_10.aa
9.0-debuginfo-9.0.120-1.el8_10.aa
redhat/dotnet-sdk-dbg<9.0-9.0.120-1.el8_10.aa
9.0-9.0.120-1.el8_10.aa
redhat/dotnet-targeting-pack<9.0-9.0.19-1.el8_10.aa
9.0-9.0.19-1.el8_10.aa
redhat/dotnet-templates<9.0-9.0.120-1.el8_10.aa
9.0-9.0.120-1.el8_10.aa
redhat/dotnet9.0-debuginfo<9.0.120-1.el8_10.aa
9.0.120-1.el8_10.aa
redhat/dotnet9.0-debugsource<9.0.120-1.el8_10.aa
9.0.120-1.el8_10.aa
redhat/netstandard-targeting-pack<2.1-9.0.120-1.el8_10.aa
2.1-9.0.120-1.el8_10.aa
redhat/dotnet-sdk<9.0-source-built-artifacts-9.0.120-1.el8_10
9.0-source-built-artifacts-9.0.120-1.el8_10
redhat/dotnet-sdk<9.0-source-built-artifacts-9.0.120-1.el8_10
9.0-source-built-artifacts-9.0.120-1.el8_10
redhat/dotnet-sdk<9.0-source-built-artifacts-9.0.120-1.el8_10.aa
9.0-source-built-artifacts-9.0.120-1.el8_10.aa
redhat/dotnet-sdk<9.0-source-built-artifacts-9.0.120-1.el8_10
9.0-source-built-artifacts-9.0.120-1.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 9.0.120-1.el8_10
  2. Upgrade

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

    Fixed in 9.0-9.0.19-1.el8_10
  3. Upgrade

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

    Fixed in 9.0-9.0.19-1.el8_10
  4. Upgrade

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

    Fixed in 9.0-9.0.19-1.el8_10
  5. Upgrade

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

    Fixed in 9.0-9.0.19-1.el8_10
  6. Upgrade

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

    Fixed in 9.0-debuginfo-9.0.19-1.el8_10
  7. Upgrade

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

    Fixed in 9.0-9.0.19-1.el8_10
  8. Upgrade

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

    Fixed in 9.0-debuginfo-9.0.19-1.el8_10
  9. Upgrade

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

    Fixed in 9.0-9.0.19-1.el8_10
  10. Upgrade

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

    Fixed in 9.0-debuginfo-9.0.19-1.el8_10
  11. Upgrade

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

    Fixed in 9.0-9.0.19-1.el8_10
  12. Upgrade

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

    Fixed in 9.0-9.0.120-1.el8_10
  13. Upgrade

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

    Fixed in 9.0-debuginfo-9.0.120-1.el8_10
  14. Upgrade

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

    Fixed in 9.0-9.0.120-1.el8_10
  15. Upgrade

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

    Fixed in 9.0-debuginfo-9.0.120-1.el8_10
  16. Upgrade

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

    Fixed in 9.0-9.0.120-1.el8_10
  17. Upgrade

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

    Fixed in 9.0-9.0.19-1.el8_10
  18. Upgrade

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

    Fixed in 9.0-9.0.120-1.el8_10
  19. Upgrade

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

    Fixed in 9.0.120-1.el8_10
  20. Upgrade

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

    Fixed in 9.0.120-1.el8_10
  21. Upgrade

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

    Fixed in 2.1-9.0.120-1.el8_10
  22. Upgrade

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

    Fixed in 9.0-9.0.19-1.el8_10.aa
  23. Upgrade

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

    Fixed in 9.0-9.0.19-1.el8_10.aa
  24. Upgrade

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

    Fixed in 9.0-9.0.19-1.el8_10.aa
  25. Upgrade

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

    Fixed in 9.0-9.0.19-1.el8_10.aa
  26. Upgrade

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

    Fixed in 9.0-debuginfo-9.0.19-1.el8_10.aa
  27. Upgrade

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

    Fixed in 9.0-9.0.19-1.el8_10.aa
  28. Upgrade

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

    Fixed in 9.0-debuginfo-9.0.19-1.el8_10.aa
  29. Upgrade

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

    Fixed in 9.0-9.0.19-1.el8_10.aa
  30. Upgrade

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

    Fixed in 9.0-debuginfo-9.0.19-1.el8_10.aa
  31. Upgrade

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

    Fixed in 9.0-9.0.19-1.el8_10.aa
  32. Upgrade

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

    Fixed in 9.0-9.0.120-1.el8_10.aa
  33. Upgrade

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

    Fixed in 9.0-debuginfo-9.0.120-1.el8_10.aa
  34. Upgrade

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

    Fixed in 9.0-9.0.120-1.el8_10.aa
  35. Upgrade

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

    Fixed in 9.0-debuginfo-9.0.120-1.el8_10.aa
  36. Upgrade

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

    Fixed in 9.0-9.0.120-1.el8_10.aa
  37. Upgrade

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

    Fixed in 9.0-9.0.19-1.el8_10.aa
  38. Upgrade

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

    Fixed in 9.0-9.0.120-1.el8_10.aa
  39. Upgrade

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

    Fixed in 9.0.120-1.el8_10.aa
  40. Upgrade

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

    Fixed in 9.0.120-1.el8_10.aa
  41. Upgrade

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

    Fixed in 2.1-9.0.120-1.el8_10.aa
  42. Upgrade

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

    Fixed in 9.0-source-built-artifacts-9.0.120-1.el8_10
  43. Upgrade

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

    Fixed in 9.0-source-built-artifacts-9.0.120-1.el8_10.aa
  44. Upgrade

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

    Fixed in 9.0.120
  45. Upgrade

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

    Fixed in 9.0.19

Event History

Aug 13, 2026
Advisory Published
via Red Hat·12:00 AM
Data Sourced
via Red Hat·12:00 AM
RemedyDescriptionAffected Software
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Frequently Asked Questions

1

What is the severity of RHSA-2026:54550?

The severity of RHSA-2026:54550 is rated as important.

2

What products are affected by RHSA-2026:54550?

RHSA-2026:54550 affects several .NET packages including redhat/dotnet-sdk and redhat/dotnet-runtime.

3

How do I fix RHSA-2026:54550?

To fix RHSA-2026:54550, you should update your .NET packages to the latest versions provided in the security update.

4

What issues does RHSA-2026:54550 address?

RHSA-2026:54550 addresses security vulnerabilities, bug fixes, and enhancements for the .NET platform.

5

When was RHSA-2026:54550 published?

RHSA-2026:54550 was published on August 13, 2026.

Company

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