CVE-2026-64491
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 versions
Linux kernel versions
6.18
and later are affected. Fixed in
6.18.39,
7.1.4,
7.2-rc2
and their respective stable series.
References
3 totalFrequently asked questions
-
What is CVE-2026-64491?
CVE-2026-64491 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.18 onward and has been patched in 6.18.39, 7.1.4 and 7.2-rc2. CVE-2026-64491 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
-
Is there a patch available for CVE-2026-64491?
Yes. CVE-2026-64491 has been patched. Fixed versions include 6.18.39, 7.1.4 and 7.2-rc2. If you are running Linux kernel 6.18 or later up to the fix versions, apply the relevant patch for your kernel branch.
-
Is CVE-2026-64491 actively exploited?
No. CVE-2026-64491 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.