NuytsTech Security

CVE-2025-38114

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

e1000: Move cancel_work_sync to avoid deadlock

Previously, e1000_down called cancel_work_sync for the e1000 reset task
(via e1000_down_and_stop), which takes RTNL.

As reported by users and syzbot, a deadlock is possible in the following
scenario:

CPU 0:
– RTNL is held
– e1000_close
– e1000_down
– cancel_work_sync (cancel / wait for e1000_reset_task())

CPU 1:
– process_one_work
– e1000_reset_task
– take RTNL

To remedy this, avoid calling cancel_work_sync from e1000_down
(e1000_reset_task does nothing if the device is down anyway). Instead,
call cancel_work_sync for e1000_reset_task when the device is being
removed.

More information : https://git.kernel.org/stable/c/1fd4438ddcc4958ed24662d5125114299e19bae4

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