CVE-2026-89446

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

iommufd: Release current IOAS on xa store() failure

iommufd take all iova rwsem() takes an object reference and the iova rwsem write lock before storing the IOAS in the temporary ioas list xarray.

If xa store() fails, the current IOAS has not been inserted into ioas list yet. iommufd release all iova rwsem() only unwinds IOAS objects already present in that xarray, so it cannot release the current IOAS.

Release the current IOAS rwsem and object reference before unwinding the previously stored entries.