What happened
In the Linux kernel, the following vulnerability has been resolved: usb: core: hcd: fix possible deadlock in rh control transfers >From within the SCSI error handler memory allocations must not trigger IO. Handling errors in UAS and the storage driver may involve resetting a device. The thread doing the reset itself relies on VM magic. However, that is insufficient, as resetting a device involves resuming it. Resumption as well as resetting involves conrol transfers to the parent of the device to be reset. That may be a root hub. Hence usbcore must heed the flags passed to usb_submit_urb() processing control transfers to root hubs. The problem exist since the storage driver has been merged.
Affected versions
Linux: e57e780b346a7277fdd3bde765d9d8728b99bfa1 through before fff917c85d37a294397c5440a795591ca9d6b602 (git); e57e780b346a7277fdd3bde765d9d8728b99bfa1 through before 549672a3fb6b36ea408238f89ecf9f41d2da6225 (git); e57e780b346a7277fdd3bde765d9d8728b99bfa1 through before d5559f43d76b398392b26a15cbc16d731969cd1c (git); 3.12 Fixed: See vendor advisory.
Why it matters
Review the vendor advisory and exposure of the affected product to determine operational impact.
Detection & mitigation
- Apply vendor-provided updates or mitigations.
- Review affected product exposure and access logs.
Public PoC references
No public PoC reference has passed the current publication threshold.