CVE-2026-64337

Description

In the Linux kernel, the following vulnerability has been resolved: usb: mtu3: unmap request DMA on queue failure mtu3_gadget_queue() maps the request before checking whether the QMU GPD ring can accept another transfer. the request is returned with -EAGAIN before it is linked on the endpoint request list if mtu3_prepare_transfer() fails. Normal completion and dequeue paths unmap requests from mtu3_req_complete(), but this error path never reaches that helper, so the DMA mapping is left active. Unmap the request before returning from the failed queue path.

References

• https://git.kernel.org/stable/c/00c3fef4c2dc2c7cbd8281f8fda09d1913420f09
• https://git.kernel.org/stable/c/0bddda5a11665c210339de76d27ebbd1a2e0b43c
• https://git.kernel.org/stable/c/3cee30f1138281a1d247bb053a1ad4f7c5b04e98
• https://git.kernel.org/stable/c/4183874b7925f4a98b400cf857bea26ee87da236
• https://git.kernel.org/stable/c/835b0596d4c9bdef93f842d8f826978fb4956b74