In the Linux kernel, the following vulnerability has been resolved:
iio: adc: xilinx-ams: fix out-of-bounds channel lookup in event handling
ams_event_to_channel() may return a pointer past the end of dev->channels when no matching scan_index is found. This can lead to invalid memory access in ams_handle_event().
Add a bounds check in ams_event_to_channel() and return NULL when no channel is found. Also guard the caller to safely handle this case.
References
- https://git.kernel.org/stable/c/116d1f8805ae2daadbac89d24da4c0da50b9edae
- https://git.kernel.org/stable/c/1d24f14e049fdd769146dda026496ed23b397ed9
- https://git.kernel.org/stable/c/3c374d33f1338dbb5676919c5194caa9c5aa1631
- https://git.kernel.org/stable/c/947eb6f0a274f8b15a0248051a65b069effd5057
- https://git.kernel.org/stable/c/94d158985b6ea011bdc26186f42d662a156da6cb
- https://git.kernel.org/stable/c/9ac3675bf875792dced45efbf47116719a7c097b