CVE-2026-98112
HighCVSS 7.8Summary
In the Linux kernel, the ksmbd listener thread exits when its listening socket is shut down. The netdevice notifier shuts down the socket before calling kthread_stop(), so the task_struct can be freed before kthread_stop() gets its reference. The fix creates the listener in a stopped state and holds an extra task_struct reference until kthread_stop_put() completes.
Risk Assessment
Use-after-free of the listener thread could lead to system crash or potential kernel code execution.
Recommendation
Install the kernel patch to ensure safe lifecycle management of ksmbd listener threads.
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Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix listener task lifetime on netdev events The listener thread exits when its listening socket is shutdown. The netdevice notifier shuts down the socket before calling kthread_stop(), so the task_struct can be freed before kthread_stop() gets its reference. Create the listener in a stopped state and hold an extra task_struct reference until kthread_stop_put() completes. Also stop and release listeners before freeing their interface records during TCP teardown.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS