Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: ALSA: usx2y: us144mkii: fix work UAF on disconnect tascam_disconnect() cancels capture_work and midi_in_work before usb_kill_anchored_urbs() kills the capture/MIDI-in URBs. Those URBs self-resubmit, and their completion handlers reschedule the work. A URB that completes in the small window between cancel_work_sync() and usb_kill_anchored_urbs() therefore re-arms the work after its only cancel. Nothing cancels it again before snd_card_free() frees the card-private tascam structure, so the work handler then runs on freed memory. Kill the anchored URBs before cancelling the work; once the work is cancelled no remaining URB can complete to re-arm it.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected c1bb0c13e430623c26543baae5bb9ae21139db87 before c071df05bcda0e47aac581d4b564b2bebcb1ff60; affected c1bb0c13e430623c26543baae5bb9ae21139db87 before 27161c68d5e78807c9d897db222a775b298d05fd; affected c1bb0c13e430623c26543baae5bb9ae21139db87 before 147996e7e7c9e8339c0e04f6fa7ccb3e4d448ff7 |
| Linux / Linux | affected 6.18; unaffected 0 before 6.18; unaffected 6.18.39 through 6.18.*; unaffected 7.1.4 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.