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

net: ethernet: stmmac: fix altr_tse_pcs function when using a fixed-link

When using a fixed-link, the altr_tse_pcs driver crashes
due to null-pointer dereference as no phy_device is provided to
tse_pcs_fix_mac_speed function. Fix this by adding a check for
phy_dev before calling the tse_pcs_fix_mac_speed() function.

Also clean up the tse_pcs_fix_mac_speed function a bit. There is
no need to check for splitter_base and sgmii_adapter_base
because the driver will fail if these 2 variables are not
derived from the device tree.

https://git.kernel.org/stable/c/08d5e3e954537931c8da7428034808d202e98299

https://git.kernel.org/stable/c/62a48383ebe2e159fd68425dd3e16d4c6bd6599a

https://git.kernel.org/stable/c/6c020f05253df04c3480b586fe188a3582740049

https://git.kernel.org/stable/c/7e59fdf9547c4f948d1d917ec7ffa5fb5ac53bdb

https://git.kernel.org/stable/c/a6aaa00324240967272b451bfa772547bd576ee6