Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: net: mctp: usb: fix race between urb completion and rx_retry cancellation It's possible that sequencing between setting ->stopped and cancelling the rx_retry work (in ndo_stop) could leave us with an urb queued: T1: ndo_stop T2: rx_retry_work ------------ ---------------- LD: ->stopped => false ST: ->stopped <= true usb_kill_urb() mctp_usb_rx_queue() usb_submit_urb() cancel_delayed_work_sync() That urb completion can then re-schedule rx_retry_work. Strenghen the sequencing between the stop (preventing another requeue) and the cancel by updating both atomically under a new rx lock. After setting ->rx_stopped, and cancelling pending work, we know that the requeue cannot occur, so all that's left is killing any pending urb.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 0791c0327a6e4e7691d6fc5ad334c215de04dcc9 before 9c46f3ee1837f6881cb99a52ffecb2760f11dc73; affected 0791c0327a6e4e7691d6fc5ad334c215de04dcc9 before d90feaa3f74bea8dafb6494631a194c70e547d94; affected 0791c0327a6e4e7691d6fc5ad334c215de04dcc9 before 54665dce982689e2fd99b32e9a0dcc204fda8a51 |
| Linux / Linux | affected 6.15; unaffected 0 before 6.15; unaffected 6.18.36 through 6.18.*; unaffected 7.0.13 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.