REDHAT-BUG-2448044: Use After Free

Use-After-Free vulnerability in the HTTP/2 server implementation of the libsoup HTTP library. The issue occurs in the onframerecvcallback() function when processing HTTP/2 frames. During header handling, the function increments an internal callback counter and emits signals such as soupservermessagegotheaders(). If a user-defined signal handler disconnects the client connection during this callback (for example due to authentication failure), the associated SoupServerMessageIOHTTP2 object may be destroyed and freed while still referenced by the callback. When execution returns to the callback, it continues to access the freed io object and attempts to update internal state, resulting in a heap use-after-free condition. An attacker can trigger this issue by sending HTTP/2 requests that cause authentication validation failures, potentially leading to application instability or crashes.