CVE-2026-64348

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> usb: free iso schedules on failed submit<br /> <br /> EHCI and FOTG210 isochronous submits build an ehci_iso_sched before<br /> linking the URB to the endpoint queue, and keep the staged schedule in<br /> urb-&gt;hcpriv until iso_stream_schedule() and the link helpers consume it.<br /> If the controller is no longer accessible, or usb_hcd_link_urb_to_ep()<br /> fails, submit jumps to done_not_linked before that handoff happens and<br /> leaks the staged schedule still attached to urb-&gt;hcpriv.<br /> <br /> Free the staged schedule from done_not_linked when submit fails before<br /> the URB is linked and clear urb-&gt;hcpriv after the free.<br /> <br /> The bug was first flagged by an experimental analysis tool we are<br /> developing for kernel memory-management bugs while analyzing<br /> v6.13-rc1. The tool is still under development and is not yet publicly<br /> available. Manual inspection confirms that the bug is still<br /> present in v7.1.1.<br /> <br /> An x86_64 allyesconfig build showed no new warnings. As we do not have an<br /> EHCI host controller with a USB isochronous device to test with, no<br /> runtime testing was able to be performed.