In the Linux kernel, the following vulnerability has been resolved:
iommu: Fix potential memory leak in iopfqueueremove_device()
The iopfqueueremovedevice() helper removes a device from the per-iommu iopf queue when PRI is disabled on the device. It responds to all outstanding iopf's with an IOMMUPAGERESPINVALID code and detaches the device from the queue.
However, it fails to release the group structure that represents a group of iopf's awaiting for a response after responding to the hardware. This can cause a memory leak if iopfqueueremove_device() is called with pending iopf's.
Fix it by calling iopffreegroup() after the iopf group is responded.