CVE-2022-48670 Information

Description

In the Linux kernel the following vulnerability has been resolved:

peci: cpu: Fix use-after-free in adev_release()

When auxiliary_device_add() returns an error auxiliary_device_uninit() is called which causes refcount for device to be decremented and .release callback will be triggered.

Because adev_release() re-calls auxiliary_device_uninit() it will cause use-after-free: [ 1269.455172] WARNING: CPU: 0 PID: 14267 at lib/refcount.c:28 refcount_warn_saturate+0x110/0x15 [ 1269.464007] refcount_t: underflow; use-after-free.

Reference

https://git.kernel.org/stable/c/c87f1f99e26ea4ae08cabe753ae98e5626bdba89 https://git.kernel.org/stable/c/1c11289b34ab67ed080bbe0f1855c4938362d9cf