CVE-2026-64491

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinuxc1bb0c13e430623c26543baae5bb9ae21139db87 < c071df05bcda0e47aac581d4b564b2bebcb1ff60affected
LinuxLinuxc1bb0c13e430623c26543baae5bb9ae21139db87 < 27161c68d5e78807c9d897db222a775b298d05fdaffected
LinuxLinuxc1bb0c13e430623c26543baae5bb9ae21139db87 < 147996e7e7c9e8339c0e04f6fa7ccb3e4d448ff7affected
LinuxLinux6.18affected
LinuxLinux0 < 6.18unaffected
LinuxLinux6.18.39 <= 6.18.*unaffected
LinuxLinux7.1.4 <= 7.1.*unaffected
LinuxLinux7.2-rc2 <= *unaffected

Weaknesses

References