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IIS in-process hosting returns HTTP 500 after runtime-async enablement

area-System.Net.Http

untriagedNew issue has not been triaged by the area ownerNew issue has not been triaged by the area owner

Status: Open.

#126925 In dotnet/runtime;

· wtgodbe opened on Apr 14, 2026

ILTrim.Tests failure in linux-x64 checked CLR_Tools_Tests

area-Infrastructure-coreclr

blocking-clean-ciBlocking PR or rolling runs of 'runtime' or 'runtime-extra-platforms'Blocking PR or rolling runs of 'runtime' or 'runtime-extra-platforms'

Known Build ErrorUse this to report build issues in the .NET Helix tabUse this to report build issues in the .NET Helix tab

untriagedNew issue has not been triaged by the area ownerNew issue has not been triaged by the area owner

Status: Open.

#126922 In dotnet/runtime;

· tannergooding opened on Apr 14, 2026

AsAnyMarshaler LayoutImplementation.ConvertToNative leaks native memory on exception

area-Interop-coreclr

bug

untriagedNew issue has not been triaged by the area ownerNew issue has not been triaged by the area owner

Status: Open.

#126908 In dotnet/runtime;

· jkoritzinsky opened on Apr 14, 2026

GC heap corruption with GCLargePages

area-GC-coreclr

untriagedNew issue has not been triaged by the area ownerNew issue has not been triaged by the area owner

Status: Open.

#126903 In dotnet/runtime;

· neiljohari opened on Apr 14, 2026

Microsoft Security Advisory CVE-2026-33116 – .NET, .NET Framework, and Visual Studio Denial of Service Vulnerability

area-System.Security

Security

untriagedNew issue has not been triaged by the area ownerNew issue has not been triaged by the area owner

Status: Open.

#126892 In dotnet/runtime;

· bribrothers opened on Apr 14, 2026

Microsoft Security Advisory CVE-2026-32203 – .NET and Visual Studio Denial of Service Vulnerability

area-System.Security

Security

untriagedNew issue has not been triaged by the area ownerNew issue has not been triaged by the area owner

Status: Open.

#126891 In dotnet/runtime;

· bribrothers opened on Apr 14, 2026

Microsoft Security Advisory CVE-2026-32178 – .NET Spoofing Vulnerability

area-Meta

Security

untriagedNew issue has not been triaged by the area ownerNew issue has not been triaged by the area owner

Status: Open.

#126890 In dotnet/runtime;

· bribrothers opened on Apr 14, 2026

Microsoft Security Advisory CVE-2026-26171 – .NET Denial of Service Vulnerability

area-System.Security

Security

untriagedNew issue has not been triaged by the area ownerNew issue has not been triaged by the area owner

Status: Open.

#126889 In dotnet/runtime;

· bribrothers opened on Apr 14, 2026

[iOS] IL trimmer incorrectly evaluates PlatformDetection.IsWindows during cross-compilation

area-Tools-ILLink.NET linker development as well as trimming analyzers.NET linker development as well as trimming analyzers

bug

os-iosApple iOSApple iOS

untriagedNew issue has not been triaged by the area ownerNew issue has not been triaged by the area owner

Status: Open.

#126882 In dotnet/runtime;

· kotlarmilos opened on Apr 14, 2026

DateOnly/TimeOnly support for XElement

area-System.Xml

untriagedNew issue has not been triaged by the area ownerNew issue has not been triaged by the area owner

Status: Open.

#126879 In dotnet/runtime;

· danielmarbach opened on Apr 14, 2026

DataContractSerializer bug when serializing nullable structs in .net >= 8.0

area-Serialization

untriagedNew issue has not been triaged by the area ownerNew issue has not been triaged by the area owner

Status: Open.

#126873 In dotnet/runtime;

· antmjones opened on Apr 14, 2026

[Perf] Linux/x64: 5 Regressions on 4/12/2026 2:20:28 AM +00:00

arch-x64

area-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMICLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI

os-linuxLinux OS (any supported distro)Linux OS (any supported distro)

runtime-coreclrspecific to the CoreCLR runtimespecific to the CoreCLR runtime

tenet-performancePerformance related issuePerformance related issue

tenet-performance-benchmarksIssue from performance benchmarkIssue from performance benchmark

untriagedNew issue has not been triaged by the area ownerNew issue has not been triaged by the area owner

Status: Open.

#126884 In dotnet/runtime;

· performanceautofiler opened on Apr 14, 2026