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Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process. libcurl would reuse a previously created connection even when some mTLS config related option had been changed that should have prohibited reuse. libcurl keeps previously used connections in a connection pool for subsequent transfers to reuse if one of them matches the setup. However, some TLS settings related to client certificates were left out from the configuration match checks, making them match too easily. In particular options related to the private key.
The bundled `curl` sources (via the Rust `curl-sys` crate) are wholly removed during the `%prep` phase to be sure we don't use them. Instead, we use the system `curl` library, so any CVE fixes only need to be made in that component on its own.