Extension Signature Verification Failed: C/C++ Extension Pack

まず、Linux 上の VS Code 1.138.0 で ms-vscode.cpptools-extension-pack のインストールを再現し、次に sharedProcessMain.js で表される共有プロセスの署名検証パスと、報告された拡張機能識別子を調査します。UnknownError の原因が特定され、インストールが成功するか、文書化されたテスト可能な失敗ケースが得られれば完了です。

Type: Bug

Please include following log F1 > Open View... > Shared below.

2026-09-19 02:34:39.928 [error] [Shared] Error while installing the extension ms-vscode.cpptools Signature verification failed with 'UnknownError' error. vscode-userdata:/home/hanjin/.vscode/extensions/extensions.json
2026-09-19 02:34:39.930 [error] [Shared] [uncaught exception in sharedProcess]: Signature verification failed with 'UnknownError' error.: SignatureVerificationInternal: Signature verification failed with 'UnknownError' error.
at Ba.downloadExtension (file:///usr/share/code/resources/app/out/vs/code/electron-utility/sharedProcess/sharedProcessMain.js:482:80412)
at async Ba.downloadAndExtractGalleryExtension (file:///usr/share/code/resources/app/out/vs/code/electron-utility/sharedProcess/sharedProcessMain.js:482:78693)
2026-09-19 02:34:39.935 [info] [Shared] Rollback: Uninstalled extension ms-vscode.cpptools-extension-pack
2026-09-19 02:34:39.935 [info] [Shared] Extension installed successfully: ms-vscode.cmake-tools vscode-userdata:/home/hanjin/.vscode/extensions/extensions.json
2026-09-19 02:34:39.935 [info] [Shared] Extension installed successfully: ms-vscode.cpp-devtools vscode-userdata:/home/hanjin/.vscode/extensions/extensions.json
2026-09-19 02:34:39.935 [info] [Shared] Extension installed successfully: ms-vscode.cpptools-themes vscode-userdata:/home/hanjin/.vscode/extensions/extensions.json
2026-09-19 02:34:39.940 [info] [Shared] Marked extension as removed ms-vscode.cpptools-extension-pack-1.5.1

Extension version: 2.0.0
VS Code version: Code 1.138.0 (7debcd0e2acdea1c52de81bf9ee1620444407dda, 2026-09-15T07:24:32Z)
OS version: Linux x64 7.2.0-61.fc45.x86_64
Modes:

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