In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: ISO: ensure no dangling hcon references in iso_conn
After isoconndel(), ISO sockets should not dereference the hcon any more. Currently, clearing isoconn::hcon relies on isoconndel() releasing the last reference to the isoconn.
Simplify this by explicitly clearing conn->hcon in isoconndel(), to avoid more complex reasoning on races about who holds the last reference.