Riskcovery

CVE-2026-64491

ALSA: usx2y: us144mkii: fix work UAF on disconnect

State
Published
Severity
Not scored
Published
Jul 25, 2026
Updated
Aug 17, 2026
Reserved
Jul 19, 2026

Read the record on cve.org

Description

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • c1bb0c13e430623c26543baae5bb9ae21139db87 to before c071df05bcda0e47aac581d4b564b2bebcb1ff60Affected
  • c1bb0c13e430623c26543baae5bb9ae21139db87 to before 27161c68d5e78807c9d897db222a775b298d05fdAffected
  • c1bb0c13e430623c26543baae5bb9ae21139db87 to before 147996e7e7c9e8339c0e04f6fa7ccb3e4d448ff7Affected
LinuxLinux
  • 6.18Affected
  • before 6.18Not affected
  • 6.18.39 through 6.18.*Not affected
  • 7.1.4 through 7.1.*Not affected
  • 7.2 and laterNot affected

References

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