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

ax25: Fix reference count leak issue of net_device

There is a reference count leak issue of the object "net_device" in
ax25_dev_device_down(). When the ax25 device is shutting down, the
ax25_dev_device_down() drops the reference count of net_device one
or zero times depending on if we goto unlock_put or not, which will
cause memory leak.

In order to solve the above issue, decrease the reference count of
net_device after dev->ax25_ptr is set to null.

kernel.org https://git.kernel.org/stable/c/36e56b1b002bb26440403053f19f9e1a8bc075b2 [No types assigned]

kernel.org https://git.kernel.org/stable/c/3ec437f9bbae68e9b38115c4c91de995f73f6bad [No types assigned]

kernel.org https://git.kernel.org/stable/c/8bad3a20a27be8d935f2aae08d3c6e743754944a [No types assigned]

kernel.org https://git.kernel.org/stable/c/965d940fb7414b310a22666503d2af69459c981b [No types assigned]

kernel.org https://git.kernel.org/stable/c/eef95df9b752699bddecefa851f64858247246e9 [No types assigned]