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.