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dotnet · dotnet/runtime · v10.0.9Good to know

dotnet/runtime v10.0.9: Bug fixes, optimizations, and dependency updates

Release v10.0.9 includes fixes for docker compose, MetaDataGetDispenser linking in singlefilehost, IJW OverflowException with 17+ by-ref parameters, SIGILL cras

10 Jun 2026Read 1 minSeverity: good to know

What changed

Release v10.0.9 includes fixes for docker compose, MetaDataGetDispenser linking in singlefilehost, IJW OverflowException with 17+ by-ref parameters, SIGILL crash on ARM64 with SME but no SVE, off-by-one error in TypePreinit switch instruction handling; adds in-memory cache for CRLs on Linux; optimizes Directory.GetFiles and dump collection performance; updates MsQuic and dependencies from dotnet/icu.

Who it affects

Developers using .NET 10.0.9 runtime, especially those on ARM64 platforms, using IJW, or relying on CRL checking on Linux.

What to do today

Update to .NET 10.0.9 to benefit from fixes and optimizations.

The trail
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