Xuan Zhuo

**Name of the Vulnerable Software and Affected Versions** Linux kernel (affected versions not specified) **Description** The issue is related to an unmap leak for indirect desc tables in the virtio packed functionality. When `use dma api` and `premapped` are true, `do unmap` is false, which prevents `vring unmap extra packed` from being called by `detach buf packed`. This results in the indirect desc table not being unmapped, causing an unmap leak. The fix involves checking `vq->use dma api` instead and synchronously updating dma info based on the `use dma api` judgment. **Recommendations** At the moment, there is no information about a newer version that contains a fix for this vulnerability.