# CVE-2026-64491: linux: In the Linux kernel, the following vulnerability has been resolved:  ALSA: usx2y: us144mkii: fix work UAF on disconne...

CVE-2026-64491 is fixed in linux on 1 platform by DEBIAN-CVE-2026-64491 (version 7.1.4-1), released August 7, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-64491
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0021
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 25, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 7.1.4-1 | [DEBIAN-CVE-2026-64491](https://patchblox.com/security/data/fix/linux/debian-cve-2026-64491.md) | Aug 7, 2026 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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