RHSA-2026:99147: Important: .NET 8.0 security, bug fix, and enhancement update
.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: 8.0.134Runtime version: 8.0.34Security Fix(es): dotnet8.0: ASP.NET Core Denial of Service Vulnerability (CVE-2026-109478) 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 8.0 to SDK 8.0.134 and Runtime 8.0.34 [rhel-10.3.z] (JIRA:RHEL-302539) 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
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
redhat/dotnet8.0to a version that resolves this vulnerability.Fixed in 8.0.134-1.el10_3 - Upgrade
Upgrade
redhat/aspnetcore-runtimeto a version that resolves this vulnerability.Fixed in 8.0-8.0.34-1.el10_3 - Upgrade
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redhat/aspnetcore-runtime-dbgto a version that resolves this vulnerability.Fixed in 8.0-8.0.34-1.el10_3 - Upgrade
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redhat/aspnetcore-targeting-packto a version that resolves this vulnerability.Fixed in 8.0-8.0.34-1.el10_3 - Upgrade
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redhat/dotnet-apphost-packto a version that resolves this vulnerability.Fixed in 8.0-8.0.34-1.el10_3 - Upgrade
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redhat/dotnet-apphost-packto a version that resolves this vulnerability.Fixed in 8.0-debuginfo-8.0.34-1.el10_3 - Upgrade
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redhat/dotnet-hostfxrto a version that resolves this vulnerability.Fixed in 8.0-8.0.34-1.el10_3 - Upgrade
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redhat/dotnet-hostfxrto a version that resolves this vulnerability.Fixed in 8.0-debuginfo-8.0.34-1.el10_3 - Upgrade
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redhat/dotnet-runtimeto a version that resolves this vulnerability.Fixed in 8.0-8.0.34-1.el10_3 - Upgrade
Upgrade
redhat/dotnet-runtimeto a version that resolves this vulnerability.Fixed in 8.0-debuginfo-8.0.34-1.el10_3 - Upgrade
Upgrade
redhat/dotnet-runtime-dbgto a version that resolves this vulnerability.Fixed in 8.0-8.0.34-1.el10_3 - Upgrade
Upgrade
redhat/dotnet-sdkto a version that resolves this vulnerability.Fixed in 8.0-8.0.134-1.el10_3 - Upgrade
Upgrade
redhat/dotnet-sdkto a version that resolves this vulnerability.Fixed in 8.0-debuginfo-8.0.134-1.el10_3 - Upgrade
Upgrade
redhat/dotnet-sdk-dbgto a version that resolves this vulnerability.Fixed in 8.0-8.0.134-1.el10_3 - Upgrade
Upgrade
redhat/dotnet-targeting-packto a version that resolves this vulnerability.Fixed in 8.0-8.0.34-1.el10_3 - Upgrade
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redhat/dotnet-templatesto a version that resolves this vulnerability.Fixed in 8.0-8.0.134-1.el10_3 - Upgrade
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redhat/dotnet8.0-debugsourceto a version that resolves this vulnerability.Fixed in 8.0.134-1.el10_3 - Upgrade
Upgrade
redhat/aspnetcore-runtimeto a version that resolves this vulnerability.Fixed in 8.0-8.0.34-1.el10_3.aa - Upgrade
Upgrade
redhat/aspnetcore-runtime-dbgto a version that resolves this vulnerability.Fixed in 8.0-8.0.34-1.el10_3.aa - Upgrade
Upgrade
redhat/aspnetcore-targeting-packto a version that resolves this vulnerability.Fixed in 8.0-8.0.34-1.el10_3.aa - Upgrade
Upgrade
redhat/dotnet-apphost-packto a version that resolves this vulnerability.Fixed in 8.0-8.0.34-1.el10_3.aa - Upgrade
Upgrade
redhat/dotnet-apphost-packto a version that resolves this vulnerability.Fixed in 8.0-debuginfo-8.0.34-1.el10_3.aa - Upgrade
Upgrade
redhat/dotnet-hostfxrto a version that resolves this vulnerability.Fixed in 8.0-8.0.34-1.el10_3.aa - Upgrade
Upgrade
redhat/dotnet-hostfxrto a version that resolves this vulnerability.Fixed in 8.0-debuginfo-8.0.34-1.el10_3.aa - Upgrade
Upgrade
redhat/dotnet-runtimeto a version that resolves this vulnerability.Fixed in 8.0-8.0.34-1.el10_3.aa - Upgrade
Upgrade
redhat/dotnet-runtimeto a version that resolves this vulnerability.Fixed in 8.0-debuginfo-8.0.34-1.el10_3.aa - Upgrade
Upgrade
redhat/dotnet-runtime-dbgto a version that resolves this vulnerability.Fixed in 8.0-8.0.34-1.el10_3.aa - Upgrade
Upgrade
redhat/dotnet-sdkto a version that resolves this vulnerability.Fixed in 8.0-8.0.134-1.el10_3.aa - Upgrade
Upgrade
redhat/dotnet-sdkto a version that resolves this vulnerability.Fixed in 8.0-debuginfo-8.0.134-1.el10_3.aa - Upgrade
Upgrade
redhat/dotnet-sdk-dbgto a version that resolves this vulnerability.Fixed in 8.0-8.0.134-1.el10_3.aa - Upgrade
Upgrade
redhat/dotnet-targeting-packto a version that resolves this vulnerability.Fixed in 8.0-8.0.34-1.el10_3.aa - Upgrade
Upgrade
redhat/dotnet-templatesto a version that resolves this vulnerability.Fixed in 8.0-8.0.134-1.el10_3.aa - Upgrade
Upgrade
redhat/dotnet8.0-debugsourceto a version that resolves this vulnerability.Fixed in 8.0.134-1.el10_3.aa - Upgrade
Upgrade
redhat/dotnet-sdkto a version that resolves this vulnerability.Fixed in 8.0-source-built-artifacts-8.0.134-1.el10_3 - Upgrade
Upgrade
redhat/dotnet-sdkto a version that resolves this vulnerability.Fixed in 8.0-source-built-artifacts-8.0.134-1.el10_3.aa - Upgrade
Upgrade
.NET 8.0 SDKto a version that resolves this vulnerability.Fixed in 8.0.134 - Upgrade
Upgrade
.NET 8.0 Runtimeto a version that resolves this vulnerability.Fixed in 8.0.34
Event History
Frequently Asked Questions
Which installed components should be reviewed for this update?
Review systems with the Red Hat .NET SDK, runtime, hostfxr, apphost pack, or ASP.NET Core runtime packages installed. The advisory also lists ASP.NET Core debug and targeting packages and .NET runtime debug packages.
Which types of applications may be exposed to the ASP.NET Core issues?
The advisory identifies ASP.NET Core denial-of-service, information-disclosure, and elevation-of-privilege vulnerabilities. Systems running ASP.NET Core applications should be prioritized because those applications may expose the affected framework functionality.
What updated .NET versions does this advisory provide?
The update provides SDK version 8.0.134 and runtime version 8.0.34.
Are the listed security fixes limited to .NET 8.0?
No. Although this is a .NET 8.0 update, the security-fix list also references affected .NET 9.0, 10.0, and 11.0 product streams for several vulnerabilities. This advisory's supplied package list is for the Red Hat .NET 8.0 components shown.