CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's LLC (Logical Link Control) subsystem, specifically in the llc_ui_autobind() function, which improperly manages reference counts for SAP (Service Access Point) sockets. This oversight can lead to resource exhaustion, as repeated binding and closing of sockets may deplete available dynamic SAP values, resulting in failures for subsequent autobind attempts. System administrators and developers using affected Linux kernel versions should prioritize this issue to prevent potential service disruptions.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: llc: fix SAP refcount leak in llc_ui_autobind() llc_ui_autobind() opens a SAP after choosing a dynamic LSAP. llc_sap_open() returns a reference owned by the caller, and llc_sap_add_socket() takes a second reference for the socket's membership in the SAP hash tables. llc_ui_bind() drops the caller's reference after adding the socket, but llc_ui_autobind() keeps it. When the socket is closed, llc_sap_remove_socket() releases only the socket reference, leaving the SAP on llc_sap_list with sk_count == 0. This is user-visible because repeated autobind and close cycles can consume all dynamic SAP values and make later autobinds fail with -EUSERS. Drop the caller's reference after a successful autobind, matching llc_ui_bind()'s ownership model.