usb: core: hcd: fix possible deadlock in rh control transfers

Summary

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.

Timeline

1. Sep 24, 2026, 4:04 PM UTCCVE published
2. Oct 3, 2026, 10:58 AM UTCRecord last updated

Affected versions

• Linux Linux

  From e57e780b346a7277fdd3bde765d9d8728b99bfa1 · fixed in 8461eda5af77c44d216cec66455bd5b01ee35c9a; From e57e780b346a7277fdd3bde765d9d8728b99bfa1 · fixed in 8f82fc3d72e5feb7a1efae94b51b431c5bf41c86; From e57e780b346a7277fdd3bde765d9d8728b99bfa1 · fixed in 936b08d87c667031725bcc753007e7c1182548c6; From e57e780b346a7277fdd3bde765d9d8728b99bfa1 · fixed in d0291fb4d91982d9f6a680bf759ff0555d351ecb; From e57e780b346a7277fdd3bde765d9d8728b99bfa1 · fixed in fff917c85d37a294397c5440a795591ca9d6b602; From e57e780b346a7277fdd3bde765d9d8728b99bfa1 · fixed in 549672a3fb6b36ea408238f89ecf9f41d2da6225; From e57e780b346a7277fdd3bde765d9d8728b99bfa1 · fixed in d5559f43d76b398392b26a15cbc16d731969cd1c

• Linux Linux

  3.12

• KernelLinux

  From 3.12.0 · fixed in 5.10.271; From 5.11.0 · fixed in 5.15.222; From 5.16.0 · fixed in 6.1.189; From 6.2.0 · fixed in 6.6.158; From 6.7.0 · fixed in 6.12.111; From 6.13.0 · fixed in 6.18.53

References 7