In the Linux kernel, the following vulnerability has been resolved: net: dsa: microchip: Don't free uninitialized kszirq If something goes wrong at setup, kszirqfree() can be called on uninitialized kszirq (for example when kszptpirqsetup() fails). It leads to freeing uninitialized IRQ numbers and/or domains. Use dsaswitchforeachuserportcontinuereverse() in the error path to iterate only over the fully initialized ports.