CVE-2026-64491 is a vulnerability in Linux Kernel
Published on July 25, 2026
ALSA: usx2y: us144mkii: fix work UAF on disconnect
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.
Products Associated with CVE-2026-64491
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Affected Versions
Linux:- Version c1bb0c13e430623c26543baae5bb9ae21139db87 and below c071df05bcda0e47aac581d4b564b2bebcb1ff60 is affected.
- Version c1bb0c13e430623c26543baae5bb9ae21139db87 and below 27161c68d5e78807c9d897db222a775b298d05fd is affected.
- Version c1bb0c13e430623c26543baae5bb9ae21139db87 and below 147996e7e7c9e8339c0e04f6fa7ccb3e4d448ff7 is affected.
- Version 6.18 is affected.
- Before 6.18 is unaffected.
- Version 6.18.39, <= 6.18.* is unaffected.
- Version 7.1.4, <= 7.1.* is unaffected.
- Version 7.2-rc2, <= * is unaffected.