CI failure on 8.0 and 9.0: MalformedPacketsDuringHandshake_ThrowsAuthenticationException fails because of PartialChain

[svick]

Build Information

Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=1508917
Build error leg or test failing: System.Net.Security.Tests.SslStreamStreamToStreamTest_MemoryAsync.MalformedPacketsDuringHandshake_ThrowsAuthenticationException
Pull request: #130724

Error Message

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Fill the error message using step by step known issues guidance.

{
  "ErrorMessage":
    [
      "System.Net.Security.Tests.SslStreamStreamToStreamTest_MemoryAsync.MalformedPacketsDuringHandshake_ThrowsAuthenticationException [FAIL]",
      "System.Security.Authentication.AuthenticationException : The remote certificate is invalid because of errors in the certificate chain: PartialChain"
    ],
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

    System.Net.Security.Tests.CertificateValidationClientServer.CertificateValidationClientServer_EndToEnd_Ok(clientCertSource: CertificateContext) [FAIL]
      sslClientStream.IsMutuallyAuthenticated
      Expected: True
      Actual:   False
      Stack Trace:
        /_/src/libraries/System.Net.Security/tests/FunctionalTests/CertificateValidationClientServer.cs(206,0): at System.Net.Security.Tests.CertificateValidationClientServer.CertificateValidationClientServer_EndToEnd_Ok(ClientCertSource clientCertSource)
        --- End of stack trace from previous location ---
    System.Net.Security.Tests.SslStreamStreamToStreamTest_MemoryAsync.MalformedPacketsDuringHandshake_ThrowsAuthenticationException [FAIL]
      System.Security.Authentication.AuthenticationException : The remote certificate is invalid because of errors in the certificate chain: PartialChain
      Stack Trace:
        /_/src/libraries/System.Net.Security/src/System/Net/Security/SslStream.IO.cs(501,0): at System.Net.Security.SslStream.SendAuthResetSignal(ReadOnlySpan`1 alert, ExceptionDispatchInfo exception)
        /_/src/libraries/System.Net.Security/src/System/Net/Security/SslStream.IO.cs(563,0): at System.Net.Security.SslStream.CompleteHandshake(SslAuthenticationOptions sslAuthenticationOptions)
        /_/src/libraries/System.Net.Security/src/System/Net/Security/SslStream.IO.cs(338,0): at System.Net.Security.SslStream.ForceAuthenticationAsync[TIOAdapter](Boolean receiveFirst, Byte[] reAuthenticationData, CancellationToken cancellationToken)
        /_/src/libraries/Common/tests/System/Threading/Tasks/TaskTimeoutExtensions.cs(120,0): at System.Threading.Tasks.TaskTimeoutExtensions.GetRealException(Task task)
        --- End of stack trace from previous location ---
        /_/src/libraries/Common/tests/System/Threading/Tasks/TaskTimeoutExtensions.cs(90,0): at System.Threading.Tasks.TaskTimeoutExtensions.WhenAllOrAnyFailed(Task[] tasks)
        /_/src/libraries/Common/tests/System/Threading/Tasks/TaskTimeoutExtensions.cs(55,0): at System.Threading.Tasks.TaskTimeoutExtensions.WhenAllOrAnyFailed(Task[] tasks, Int32 millisecondsTimeout)
        /_/src/libraries/System.Net.Security/tests/FunctionalTests/SslStreamStreamToStreamTest.cs(755,0): at System.Net.Security.Tests.SslStreamStreamToStreamTest_MemoryAsync.MalformedPacketsDuringHandshake_ThrowsAuthenticationException()
        --- End of stack trace from previous location ---

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1508917
Error message validated: [System.Net.Security.Tests.SslStreamStreamToStreamTest_MemoryAsync.MalformedPacketsDuringHandshake_ThrowsAuthenticationException [FAIL] System.Security.Authentication.AuthenticationException : The remote certificate is invalid because of errors in the certificate chain: PartialChain]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 7/16/2026 5:12:56 PM UTC

Report

Build	Repository	Test	Pull Request
1528324	dotnet/runtime	System.Net.Security.Tests.SslStreamStreamToStreamTest_MemoryAsync.MalformedPacketsDuringHandshake_ThrowsAuthenticationException	#131415
1522784	dotnet/runtime	System.Net.Security.Tests.SslStreamStreamToStreamTest_MemoryAsync.MalformedPacketsDuringHandshake_ThrowsAuthenticationException	#130943
1520880	dotnet/runtime	System.Net.Security.Tests.SslStreamStreamToStreamTest_MemoryAsync.MalformedPacketsDuringHandshake_ThrowsAuthenticationException	#131179
1519953	dotnet/runtime	System.Net.Security.Tests.SslStreamStreamToStreamTest_MemoryAsync.MalformedPacketsDuringHandshake_ThrowsAuthenticationException
1519700	dotnet/runtime	System.Net.Security.Tests.SslStreamStreamToStreamTest_MemoryAsync.MalformedPacketsDuringHandshake_ThrowsAuthenticationException
1519926	dotnet/runtime	System.Net.Security.Tests.SslStreamStreamToStreamTest_MemoryAsync.MalformedPacketsDuringHandshake_ThrowsAuthenticationException
1519808	dotnet/runtime	System.Net.Security.Tests.SslStreamStreamToStreamTest_MemoryAsync.MalformedPacketsDuringHandshake_ThrowsAuthenticationException
1519745	dotnet/runtime	System.Net.Security.Tests.SslStreamStreamToStreamTest_MemoryAsync.MalformedPacketsDuringHandshake_ThrowsAuthenticationException	#130598
1519697	dotnet/runtime	System.Net.Security.Tests.SslStreamStreamToStreamTest_MemoryAsync.MalformedPacketsDuringHandshake_ThrowsAuthenticationException
1519577	dotnet/runtime	System.Net.Security.Tests.SslStreamStreamToStreamTest_MemoryAsync.MalformedPacketsDuringHandshake_ThrowsAuthenticationException
1519006	dotnet/runtime	System.Net.Security.Tests.SslStreamStreamToStreamTest_MemoryAsync.MalformedPacketsDuringHandshake_ThrowsAuthenticationException	#131126
1518742	dotnet/runtime	System.Net.Security.Tests.SslStreamStreamToStreamTest_MemoryAsync.MalformedPacketsDuringHandshake_ThrowsAuthenticationException	#131044
1516764	dotnet/runtime	System.Net.Security.Tests.SslStreamStreamToStreamTest_MemoryAsync.MalformedPacketsDuringHandshake_ThrowsAuthenticationException	#131044
3024988	dotnet-runtime	System.Net.Security.Tests.SslStreamStreamToStreamTest_MemoryAsync.MalformedPacketsDuringHandshake_ThrowsAuthenticationException	#62989
3024986	dotnet-runtime	System.Net.Security.Tests.SslStreamStreamToStreamTest_MemoryAsync.MalformedPacketsDuringHandshake_ThrowsAuthenticationException	#62988
1514458	dotnet/runtime	System.Net.Security.Tests.SslStreamStreamToStreamTest_MemoryAsync.MalformedPacketsDuringHandshake_ThrowsAuthenticationException
3024690	dotnet-runtime	System.Net.Security.Tests.SslStreamStreamToStreamTest_MemoryAsync.MalformedPacketsDuringHandshake_ThrowsAuthenticationException	#62978
1514455	dotnet/runtime	System.Net.Security.Tests.SslStreamStreamToStreamTest_MemoryAsync.MalformedPacketsDuringHandshake_ThrowsAuthenticationException
1514464	dotnet/runtime	System.Net.Security.Tests.SslStreamStreamToStreamTest_MemoryAsync.MalformedPacketsDuringHandshake_ThrowsAuthenticationException	#130862
1514053	dotnet/runtime	System.Net.Security.Tests.SslStreamStreamToStreamTest_MemoryAsync.MalformedPacketsDuringHandshake_ThrowsAuthenticationException	#130943
1513554	dotnet/runtime	System.Net.Security.Tests.SslStreamStreamToStreamTest_MemoryAsync.MalformedPacketsDuringHandshake_ThrowsAuthenticationException	#130724
1508917	dotnet/runtime	System.Net.Security.Tests.SslStreamStreamToStreamTest_MemoryAsync.MalformedPacketsDuringHandshake_ThrowsAuthenticationException	#130724

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
1	11	22

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[rzikm]

Should be fixed now by #131148 and #131149