RHSA-2026:55858: Important: .NET 10.0 security, bug fix, and enhancement update

Published Aug 17, 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: 10.0.111Runtime version: 10.0.11Security 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 10.0 to SDK 10.0.111 and Runtime 10.0.11 [rhel-10.2.z] (JIRA:RHEL-235482) 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 10.0 security, bug fix, and enhancement update

— Red Hat

Affected Software

105 affected componentsFixes available
Red Hat Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Red Hat Enterprise Linux for x86_64 - 4 years of updates
Red Hat Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support
Red Hat Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle
Red Hat Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Red Hat Enterprise Linux for IBM z Systems
Red Hat Red Hat CodeReady Linux Builder for x86_64
Red Hat Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Red Hat CodeReady Linux Builder for IBM z Systems
Red Hat Red Hat CodeReady Linux Builder for IBM z Systems - Extended Update Support
Red Hat Red Hat Enterprise Linux for ARM 64 - 4 years of updates
Red Hat Red Hat Enterprise Linux for ARM 64
Red Hat Red Hat Enterprise Linux for Power, little endian
Red Hat Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle
Red Hat Red Hat Enterprise Linux for IBM z Systems - 4 years of updates
Red Hat Red Hat Enterprise Linux for x86_64 - Extended Life Cycle
Red Hat Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support
Red Hat Red Hat CodeReady Linux Builder for ARM 64
Red Hat Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle
Red Hat Red Hat CodeReady Linux Builder for Power, little endian
Red Hat Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support
Red Hat Red Hat Enterprise Linux for Power, little endian - 4 years of support
Red Hat Red Hat Enterprise Linux for x86_64
redhat/dotnet10.0<10.0.111-1.el10_2
10.0.111-1.el10_2
redhat/aspnetcore-runtime<10.0-10.0.11-1.el10_2
10.0-10.0.11-1.el10_2
redhat/aspnetcore-runtime-dbg<10.0-10.0.11-1.el10_2
10.0-10.0.11-1.el10_2
redhat/aspnetcore-targeting-pack<10.0-10.0.11-1.el10_2
10.0-10.0.11-1.el10_2
redhat/dotnet-apphost-pack<10.0-10.0.11-1.el10_2
10.0-10.0.11-1.el10_2
redhat/dotnet-apphost-pack<10.0-debuginfo-10.0.11-1.el10_2
10.0-debuginfo-10.0.11-1.el10_2
redhat/dotnet-host<10.0.11-1.el10_2
10.0.11-1.el10_2
redhat/dotnet-host-debuginfo<10.0.11-1.el10_2
10.0.11-1.el10_2
redhat/dotnet-hostfxr<10.0-10.0.11-1.el10_2
10.0-10.0.11-1.el10_2
redhat/dotnet-hostfxr<10.0-debuginfo-10.0.11-1.el10_2
10.0-debuginfo-10.0.11-1.el10_2
redhat/dotnet-runtime<10.0-10.0.11-1.el10_2
10.0-10.0.11-1.el10_2
redhat/dotnet-runtime<10.0-debuginfo-10.0.11-1.el10_2
10.0-debuginfo-10.0.11-1.el10_2
redhat/dotnet-runtime-dbg<10.0-10.0.11-1.el10_2
10.0-10.0.11-1.el10_2
redhat/dotnet-sdk<10.0-10.0.111-1.el10_2
10.0-10.0.111-1.el10_2
redhat/dotnet-sdk<10.0-debuginfo-10.0.111-1.el10_2
10.0-debuginfo-10.0.111-1.el10_2
redhat/dotnet-sdk-aot<10.0-10.0.111-1.el10_2
10.0-10.0.111-1.el10_2
redhat/dotnet-sdk-aot<10.0-debuginfo-10.0.111-1.el10_2
10.0-debuginfo-10.0.111-1.el10_2
redhat/dotnet-sdk-dbg<10.0-10.0.111-1.el10_2
10.0-10.0.111-1.el10_2
redhat/dotnet-targeting-pack<10.0-10.0.11-1.el10_2
10.0-10.0.11-1.el10_2
redhat/dotnet-templates<10.0-10.0.111-1.el10_2
10.0-10.0.111-1.el10_2
redhat/dotnet10.0-debugsource<10.0.111-1.el10_2
10.0.111-1.el10_2
redhat/aspnetcore-runtime<10.0-10.0.11-1.el10_2
10.0-10.0.11-1.el10_2
redhat/aspnetcore-runtime-dbg<10.0-10.0.11-1.el10_2
10.0-10.0.11-1.el10_2
redhat/aspnetcore-targeting-pack<10.0-10.0.11-1.el10_2
10.0-10.0.11-1.el10_2
redhat/dotnet-apphost-pack<10.0-10.0.11-1.el10_2
10.0-10.0.11-1.el10_2
redhat/dotnet-apphost-pack<10.0-debuginfo-10.0.11-1.el10_2
10.0-debuginfo-10.0.11-1.el10_2
redhat/dotnet-host<10.0.11-1.el10_2
10.0.11-1.el10_2
redhat/dotnet-host-debuginfo<10.0.11-1.el10_2
10.0.11-1.el10_2
redhat/dotnet-hostfxr<10.0-10.0.11-1.el10_2
10.0-10.0.11-1.el10_2
redhat/dotnet-hostfxr<10.0-debuginfo-10.0.11-1.el10_2
10.0-debuginfo-10.0.11-1.el10_2
redhat/dotnet-runtime<10.0-10.0.11-1.el10_2
10.0-10.0.11-1.el10_2
redhat/dotnet-runtime<10.0-debuginfo-10.0.11-1.el10_2
10.0-debuginfo-10.0.11-1.el10_2
redhat/dotnet-runtime-dbg<10.0-10.0.11-1.el10_2
10.0-10.0.11-1.el10_2
redhat/dotnet-sdk<10.0-10.0.111-1.el10_2
10.0-10.0.111-1.el10_2
redhat/dotnet-sdk<10.0-debuginfo-10.0.111-1.el10_2
10.0-debuginfo-10.0.111-1.el10_2
redhat/dotnet-sdk-dbg<10.0-10.0.111-1.el10_2
10.0-10.0.111-1.el10_2
redhat/dotnet-targeting-pack<10.0-10.0.11-1.el10_2
10.0-10.0.11-1.el10_2
redhat/dotnet-templates<10.0-10.0.111-1.el10_2
10.0-10.0.111-1.el10_2
redhat/dotnet10.0-debugsource<10.0.111-1.el10_2
10.0.111-1.el10_2
redhat/aspnetcore-runtime<10.0-10.0.11-1.el10_2
10.0-10.0.11-1.el10_2
redhat/aspnetcore-runtime-dbg<10.0-10.0.11-1.el10_2
10.0-10.0.11-1.el10_2
redhat/aspnetcore-targeting-pack<10.0-10.0.11-1.el10_2
10.0-10.0.11-1.el10_2
redhat/dotnet-apphost-pack<10.0-10.0.11-1.el10_2
10.0-10.0.11-1.el10_2
redhat/dotnet-apphost-pack<10.0-debuginfo-10.0.11-1.el10_2
10.0-debuginfo-10.0.11-1.el10_2
redhat/dotnet-host<10.0.11-1.el10_2
10.0.11-1.el10_2
redhat/dotnet-host-debuginfo<10.0.11-1.el10_2
10.0.11-1.el10_2
redhat/dotnet-hostfxr<10.0-10.0.11-1.el10_2
10.0-10.0.11-1.el10_2
redhat/dotnet-hostfxr<10.0-debuginfo-10.0.11-1.el10_2
10.0-debuginfo-10.0.11-1.el10_2
redhat/dotnet-runtime<10.0-10.0.11-1.el10_2
10.0-10.0.11-1.el10_2
redhat/dotnet-runtime<10.0-debuginfo-10.0.11-1.el10_2
10.0-debuginfo-10.0.11-1.el10_2
redhat/dotnet-runtime-dbg<10.0-10.0.11-1.el10_2
10.0-10.0.11-1.el10_2
redhat/dotnet-sdk<10.0-10.0.111-1.el10_2
10.0-10.0.111-1.el10_2
redhat/dotnet-sdk<10.0-debuginfo-10.0.111-1.el10_2
10.0-debuginfo-10.0.111-1.el10_2
redhat/dotnet-sdk-dbg<10.0-10.0.111-1.el10_2
10.0-10.0.111-1.el10_2
redhat/dotnet-targeting-pack<10.0-10.0.11-1.el10_2
10.0-10.0.11-1.el10_2
redhat/dotnet-templates<10.0-10.0.111-1.el10_2
10.0-10.0.111-1.el10_2
redhat/dotnet10.0-debugsource<10.0.111-1.el10_2
10.0.111-1.el10_2
redhat/aspnetcore-runtime<10.0-10.0.11-1.el10_2.aa
10.0-10.0.11-1.el10_2.aa
redhat/aspnetcore-runtime-dbg<10.0-10.0.11-1.el10_2.aa
10.0-10.0.11-1.el10_2.aa
redhat/aspnetcore-targeting-pack<10.0-10.0.11-1.el10_2.aa
10.0-10.0.11-1.el10_2.aa
redhat/dotnet-apphost-pack<10.0-10.0.11-1.el10_2.aa
10.0-10.0.11-1.el10_2.aa
redhat/dotnet-apphost-pack<10.0-debuginfo-10.0.11-1.el10_2.aa
10.0-debuginfo-10.0.11-1.el10_2.aa
redhat/dotnet-host<10.0.11-1.el10_2.aa
10.0.11-1.el10_2.aa
redhat/dotnet-host-debuginfo<10.0.11-1.el10_2.aa
10.0.11-1.el10_2.aa
redhat/dotnet-hostfxr<10.0-10.0.11-1.el10_2.aa
10.0-10.0.11-1.el10_2.aa
redhat/dotnet-hostfxr<10.0-debuginfo-10.0.11-1.el10_2.aa
10.0-debuginfo-10.0.11-1.el10_2.aa
redhat/dotnet-runtime<10.0-10.0.11-1.el10_2.aa
10.0-10.0.11-1.el10_2.aa
redhat/dotnet-runtime<10.0-debuginfo-10.0.11-1.el10_2.aa
10.0-debuginfo-10.0.11-1.el10_2.aa
redhat/dotnet-runtime-dbg<10.0-10.0.11-1.el10_2.aa
10.0-10.0.11-1.el10_2.aa
redhat/dotnet-sdk<10.0-10.0.111-1.el10_2.aa
10.0-10.0.111-1.el10_2.aa
redhat/dotnet-sdk<10.0-debuginfo-10.0.111-1.el10_2.aa
10.0-debuginfo-10.0.111-1.el10_2.aa
redhat/dotnet-sdk-aot<10.0-10.0.111-1.el10_2.aa
10.0-10.0.111-1.el10_2.aa
redhat/dotnet-sdk-aot<10.0-debuginfo-10.0.111-1.el10_2.aa
10.0-debuginfo-10.0.111-1.el10_2.aa
redhat/dotnet-sdk-dbg<10.0-10.0.111-1.el10_2.aa
10.0-10.0.111-1.el10_2.aa
redhat/dotnet-targeting-pack<10.0-10.0.11-1.el10_2.aa
10.0-10.0.11-1.el10_2.aa
redhat/dotnet-templates<10.0-10.0.111-1.el10_2.aa
10.0-10.0.111-1.el10_2.aa
redhat/dotnet10.0-debugsource<10.0.111-1.el10_2.aa
10.0.111-1.el10_2.aa
redhat/dotnet-sdk<10.0-source-built-artifacts-10.0.111-1.el10_2
10.0-source-built-artifacts-10.0.111-1.el10_2
redhat/dotnet-sdk<10.0-source-built-artifacts-10.0.111-1.el10_2
10.0-source-built-artifacts-10.0.111-1.el10_2
redhat/dotnet-sdk<10.0-source-built-artifacts-10.0.111-1.el10_2.aa
10.0-source-built-artifacts-10.0.111-1.el10_2.aa
redhat/dotnet-sdk<10.0-source-built-artifacts-10.0.111-1.el10_2
10.0-source-built-artifacts-10.0.111-1.el10_2

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/dotnet10.0 to a version that resolves this vulnerability.

    Fixed in 10.0.111-1.el10_2
  2. Upgrade

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

    Fixed in 10.0-10.0.11-1.el10_2
  3. Upgrade

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

    Fixed in 10.0-10.0.11-1.el10_2
  4. Upgrade

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

    Fixed in 10.0-10.0.11-1.el10_2
  5. Upgrade

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

    Fixed in 10.0-10.0.11-1.el10_2
  6. Upgrade

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

    Fixed in 10.0-debuginfo-10.0.11-1.el10_2
  7. Upgrade

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

    Fixed in 10.0.11-1.el10_2
  8. Upgrade

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

    Fixed in 10.0.11-1.el10_2
  9. Upgrade

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

    Fixed in 10.0-10.0.11-1.el10_2
  10. Upgrade

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

    Fixed in 10.0-debuginfo-10.0.11-1.el10_2
  11. Upgrade

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

    Fixed in 10.0-10.0.11-1.el10_2
  12. Upgrade

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

    Fixed in 10.0-debuginfo-10.0.11-1.el10_2
  13. Upgrade

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

    Fixed in 10.0-10.0.11-1.el10_2
  14. Upgrade

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

    Fixed in 10.0-10.0.111-1.el10_2
  15. Upgrade

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

    Fixed in 10.0-debuginfo-10.0.111-1.el10_2
  16. Upgrade

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

    Fixed in 10.0-10.0.111-1.el10_2
  17. Upgrade

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

    Fixed in 10.0-debuginfo-10.0.111-1.el10_2
  18. Upgrade

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

    Fixed in 10.0-10.0.111-1.el10_2
  19. Upgrade

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

    Fixed in 10.0-10.0.11-1.el10_2
  20. Upgrade

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

    Fixed in 10.0-10.0.111-1.el10_2
  21. Upgrade

    Upgrade redhat/dotnet10.0-debugsource to a version that resolves this vulnerability.

    Fixed in 10.0.111-1.el10_2
  22. Upgrade

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

    Fixed in 10.0-10.0.11-1.el10_2.aa
  23. Upgrade

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

    Fixed in 10.0-10.0.11-1.el10_2.aa
  24. Upgrade

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

    Fixed in 10.0-10.0.11-1.el10_2.aa
  25. Upgrade

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

    Fixed in 10.0-10.0.11-1.el10_2.aa
  26. Upgrade

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

    Fixed in 10.0-debuginfo-10.0.11-1.el10_2.aa
  27. Upgrade

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

    Fixed in 10.0.11-1.el10_2.aa
  28. Upgrade

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

    Fixed in 10.0.11-1.el10_2.aa
  29. Upgrade

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

    Fixed in 10.0-10.0.11-1.el10_2.aa
  30. Upgrade

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

    Fixed in 10.0-debuginfo-10.0.11-1.el10_2.aa
  31. Upgrade

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

    Fixed in 10.0-10.0.11-1.el10_2.aa
  32. Upgrade

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

    Fixed in 10.0-debuginfo-10.0.11-1.el10_2.aa
  33. Upgrade

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

    Fixed in 10.0-10.0.11-1.el10_2.aa
  34. Upgrade

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

    Fixed in 10.0-10.0.111-1.el10_2.aa
  35. Upgrade

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

    Fixed in 10.0-debuginfo-10.0.111-1.el10_2.aa
  36. Upgrade

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

    Fixed in 10.0-10.0.111-1.el10_2.aa
  37. Upgrade

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

    Fixed in 10.0-debuginfo-10.0.111-1.el10_2.aa
  38. Upgrade

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

    Fixed in 10.0-10.0.111-1.el10_2.aa
  39. Upgrade

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

    Fixed in 10.0-10.0.11-1.el10_2.aa
  40. Upgrade

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

    Fixed in 10.0-10.0.111-1.el10_2.aa
  41. Upgrade

    Upgrade redhat/dotnet10.0-debugsource to a version that resolves this vulnerability.

    Fixed in 10.0.111-1.el10_2.aa
  42. Upgrade

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

    Fixed in 10.0-source-built-artifacts-10.0.111-1.el10_2
  43. Upgrade

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

    Fixed in 10.0-source-built-artifacts-10.0.111-1.el10_2.aa
  44. Upgrade

    Upgrade Microsoft .NET 10.0 SDK to a version that resolves this vulnerability.

    Fixed in 10.0.111Patch JIRA:RHEL-235482
  45. Upgrade

    Upgrade Microsoft .NET 10.0 Runtime to a version that resolves this vulnerability.

    Fixed in 10.0.11Patch JIRA:RHEL-235482

Event History

Aug 17, 2026
Advisory Published
via Red Hat·12:00 AM
Data Sourced
via Red Hat·12:00 AM
RemedyDescriptionAffected Software
Advisory Published
via Red Hat·07:36 PM
Data Sourced
via Red Hat·07:36 PM
Severity

Frequently Asked Questions

1

What is the severity of RHSA-2026:55858?

The severity of RHSA-2026:55858 is classified as high with a score of 7.

2

How do I fix RHSA-2026:55858?

To fix RHSA-2026:55858, apply the relevant updates provided by Red Hat for your specific architecture.

3

What does RHSA-2026:55858 address?

RHSA-2026:55858 addresses important security vulnerabilities, bug fixes, and enhancements related to .NET 10.0.

4

Which software is affected by RHSA-2026:55858?

RHSA-2026:55858 affects several Red Hat Enterprise Linux variants including x86_64, ARM 64, and IBM z Systems.

5

When was RHSA-2026:55858 published?

RHSA-2026:55858 was published on August 17, 2026.

Company

Resources

Contact

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