In the Linux kernel, the following vulnerability has been resolved:
spi: tegra20-slink: fix UAF in tegra_slink_remove()
After calling spi_unregister_master(), the refcount of master will be decrease to 0, and it will be freed in spi_controller_release(), the device data also will be freed, so it will lead a UAF when using 'tspi'. To fix this, get the master before unregister and put it when finish using it.
| Software | From | Fixed in |
|---|---|---|
| linux / linux_kernel | 5.15 | 5.15.61 |
| linux / linux_kernel | 5.16 | 5.18.18 |
| linux / linux_kernel | 5.19 | 5.19.2 |