RLSA-2026:54550

Synopsis

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

Description

.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: 9.0.120

Runtime version: 9.0.19

Security 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:Rocky Linux-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 products

Rocky Linux 8 aarch64 Rocky Linux 8 x86_64

Fixes

2512175 2512179 2512180 2512185

CVEs

CVE-2026-62899 CVE-2026-62900 CVE-2026-62901 CVE-2026-62909

Affected packages

Rocky Linux 8 aarch64 - AppStream

aspnetcore-runtime-9.0-0:9.0.19-1.el8_10.aarch64.rpm aspnetcore-runtime-dbg-9.0-0:9.0.19-1.el8_10.aarch64.rpm aspnetcore-targeting-pack-9.0-0:9.0.19-1.el8_10.aarch64.rpm dotnet9.0-0:9.0.120-1.el8_10.src.rpm dotnet9.0-debuginfo-0:9.0.120-1.el8_10.aarch64.rpm dotnet9.0-debugsource-0:9.0.120-1.el8_10.aarch64.rpm dotnet-apphost-pack-9.0-0:9.0.19-1.el8_10.aarch64.rpm dotnet-apphost-pack-9.0-debuginfo-0:9.0.19-1.el8_10.aarch64.rpm dotnet-hostfxr-9.0-0:9.0.19-1.el8_10.aarch64.rpm dotnet-hostfxr-9.0-debuginfo-0:9.0.19-1.el8_10.aarch64.rpm dotnet-runtime-9.0-0:9.0.19-1.el8_10.aarch64.rpm dotnet-runtime-9.0-debuginfo-0:9.0.19-1.el8_10.aarch64.rpm dotnet-runtime-dbg-9.0-0:9.0.19-1.el8_10.aarch64.rpm dotnet-sdk-9.0-0:9.0.120-1.el8_10.aarch64.rpm dotnet-sdk-9.0-debuginfo-0:9.0.120-1.el8_10.aarch64.rpm dotnet-sdk-aot-9.0-0:9.0.120-1.el8_10.aarch64.rpm dotnet-sdk-aot-9.0-debuginfo-0:9.0.120-1.el8_10.aarch64.rpm dotnet-sdk-dbg-9.0-0:9.0.120-1.el8_10.aarch64.rpm dotnet-targeting-pack-9.0-0:9.0.19-1.el8_10.aarch64.rpm dotnet-templates-9.0-0:9.0.120-1.el8_10.aarch64.rpm netstandard-targeting-pack-2.1-0:9.0.120-1.el8_10.aarch64.rpm

Rocky Linux 8 x86_64 - AppStream

aspnetcore-runtime-9.0-0:9.0.19-1.el8_10.x86_64.rpm aspnetcore-runtime-dbg-9.0-0:9.0.19-1.el8_10.x86_64.rpm aspnetcore-targeting-pack-9.0-0:9.0.19-1.el8_10.x86_64.rpm dotnet9.0-0:9.0.120-1.el8_10.src.rpm dotnet9.0-debuginfo-0:9.0.120-1.el8_10.x86_64.rpm dotnet9.0-debugsource-0:9.0.120-1.el8_10.x86_64.rpm dotnet-apphost-pack-9.0-0:9.0.19-1.el8_10.x86_64.rpm dotnet-apphost-pack-9.0-debuginfo-0:9.0.19-1.el8_10.x86_64.rpm dotnet-hostfxr-9.0-0:9.0.19-1.el8_10.x86_64.rpm dotnet-hostfxr-9.0-debuginfo-0:9.0.19-1.el8_10.x86_64.rpm dotnet-runtime-9.0-0:9.0.19-1.el8_10.x86_64.rpm dotnet-runtime-9.0-debuginfo-0:9.0.19-1.el8_10.x86_64.rpm dotnet-runtime-dbg-9.0-0:9.0.19-1.el8_10.x86_64.rpm dotnet-sdk-9.0-0:9.0.120-1.el8_10.x86_64.rpm dotnet-sdk-9.0-debuginfo-0:9.0.120-1.el8_10.x86_64.rpm dotnet-sdk-aot-9.0-0:9.0.120-1.el8_10.x86_64.rpm dotnet-sdk-aot-9.0-debuginfo-0:9.0.120-1.el8_10.x86_64.rpm dotnet-sdk-dbg-9.0-0:9.0.120-1.el8_10.x86_64.rpm dotnet-targeting-pack-9.0-0:9.0.19-1.el8_10.x86_64.rpm dotnet-templates-9.0-0:9.0.120-1.el8_10.x86_64.rpm netstandard-targeting-pack-2.1-0:9.0.120-1.el8_10.x86_64.rpm

Rocky Linux 8 aarch64 - PowerTools

dotnet-sdk-9.0-source-built-artifacts-0:9.0.120-1.el8_10.aarch64.rpm

Rocky Linux 8 x86_64 - PowerTools

dotnet-sdk-9.0-source-built-artifacts-0:9.0.120-1.el8_10.x86_64.rpm