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

i2c: atr: fix dangling adapter pointer on add failure

i2c atr add adapter() stores atr->adapter[chan id] before i2c add adapter() so that the I2C bus notifier can match child clients during registration. On failure the channel is freed but the slot was left pointing at freed memory, which can lead to use-after-free in i2c atr del adapter() / cleanup and also block reuse with -EEXIST.

Clear the slot on the i2c add adapter() error path before freeing chan.