CVE-2026-64337
Published: July 29, 2026Last modified: August 14, 2026
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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.5 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Fixed (6.1.182-r0) |
| 25 LTS | linux-lts | Fixed (6.12.103-r0) | |
| Stream | linux-lts | Fixed (6.18.43-r0) |
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
- https://git.kernel.org/stable/c/8c29d9cfab1c3cf0d0b7fcdf9255597be30aa3e1
- https://git.kernel.org/stable/c/e8f739a3860d043dcc135371637e82f53132efe5
- https://git.kernel.org/stable/c/f3c4026524d3660c73ef2838b99776d37631e039