There is a use-after-free vulnerability in the Linux Kernel which can be exploited to achieve local privilege escalation. To reach the vulnerability kernel configuration flag CONFIG_TLS��or CONFIG_XFRM_ESPINTCP��has to be configured, but the operation does not require any privilege. There is a use-after-free bug of icsk_ulp_data��of a struct inet_connection_sock. When CONFIG_TLS��is enabled, user can install a tls context (struct tls_context) on a connected tcp socket. The context is not cleared if this socket is disconnected and reused as a listener. If a new socket is created from the listener, the context is inherited and vulnerable. The setsockopt��TCP_ULP��operation does not require any privilege. We recommend upgrading past commit��2c02d41d71f90a5168391b6a5f2954112ba2307c