CVE-2026-46047

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

net: qrtr: ns: Fix use-after-free in driver remove()

In the remove callback, if a packet arrives after destroy_workqueue() is

called, but before sock_release(), the qrtr_ns_data_ready() callback will

try to queue the work, causing use-after-free issue.

Fix this issue by saving the default 'sk_data_ready' callback during

qrtr_ns_init() and use it to replace the qrtr_ns_data_ready() callback at

the start of remove(). This ensures that even if a packet arrives after

destroy_workqueue(), the work struct will not be dereferenced.

Note that it is also required to ensure that the RX threads are completed

before destroying the workqueue, because the threads could be using the

qrtr_ns_data_ready() callback.