CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's handling of TLS handshakes in the SUNRPC subsystem, specifically during the cancellation of handshake requests. If a handshake is canceled while the completion callback is still executing, it could lead to a use-after-free condition, potentially allowing for arbitrary code execution or denial of service. Organizations using Linux systems, particularly those relying on SUNRPC for secure communications, should prioritize addressing this issue to mitigate associated risks.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: SUNRPC: wait for in-flight client TLS handshake callback xs_tls_handshake_sync() gives xs_tls_handshake_done() a reference to the lower transport before submitting the handshake request. On timeout or signal, the synchronous waiter drops that reference after calling tls_handshake_cancel(). handshake_req_cancel() returns false when handshake_complete() has already marked the request complete. In that case the completion callback can still be running, so dropping the callback-owned reference in the waiter can free the lower transport before xs_tls_handshake_done() stores xprt_err or drops its own reference. If cancellation loses to completion, wait until xs_tls_handshake_done() signals handshake_done and let the callback release its reference. This mirrors the server-side handshake lifetime handling and keeps the timeout or signal return value unchanged.