| Package | Affected versions | Patched versions |
|---|---|---|
| envoy | ≥ 1.19.0, < 1.19.3≥ 1.20.0, < 1.20.2≥ 1.21.0, < 1.21.1< 1.18.6 | 1.19.31.20.21.21.11.18.6 |
Envoy is an open source edge and service proxy, designed for cloud-native applications. In affected versions of Envoy a crash occurs when configured for :ref:`upstream tunneling <envoy_v3_api_field_extensions.filters.network.tcp_proxy.v3.TcpProxy.tunneling_config>` and the downstream connection disconnects while the the upstream connection or http/2 stream is still being established. There are no workarounds for this issue. Users are advised to upgrade.
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