In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: ISO: ensure no dangling hcon references in iso conn

After iso conn del(), ISO sockets should not dereference the hcon any more. Currently, clearing iso conn::hcon relies on iso conn del() releasing the last reference to the iso conn.

Simplify this by explicitly clearing conn->hcon in iso conn del(), to avoid more complex reasoning on races about who holds the last reference.