In the Linux kernel, the following vulnerability has been resolved:
gpio: mt7621: avoid corruption of shared interrupt trigger state
The bank-shared fields like 'rising' and 'falling' are modified using
non-atomic read-modify-write operations. Since every gpio chip instance
represents an entire bank of 32 pins, if 'mediatek_gpio_irq_type()' is
called concurrently for different IRQs on the same bank a possible overwrite
of each other's configuration is possible. Thus, protect this state with
'gpio_generic_lock_irqsave' lock in the same way it is handled in irp_chip
'mediatek_gpio_irq_mask()' and 'mediatek_gpio_irq_unmask()' callbacks.
References 6
https://git.kernel.org/stable/c/1781172526d1092323af443fa03f00e6de560401
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/207d3ebf36f654a43a934addeb4d6775cb2dd667
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/877a243006788aaa586b2d087f27c9f3628071b0
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/a60a40c9ba30edd06d3fb4215fdf430ed968728e
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/d3b9026ef78da3018a7d2c5a9c9d611de6d45c47
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/bddf9314a57a243dd11ed945ba11e146e331257e
416baaa9-dc9f-4396-8d5f-8c081fb06d67