Improper Locking Affecting linux-virt package, versions <6.12.18-r0


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.04% (13th percentile)

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  • Snyk IDSNYK-MINIMOSLATEST-LINUXVIRT-13325696
  • published6 Oct 2025
  • disclosed12 Mar 2025

Introduced: 12 Mar 2025

CVE-2025-21859  (opens in a new tab)
CWE-667  (opens in a new tab)

How to fix?

Upgrade Minimos:latest linux-virt to version 6.12.18-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream linux-virt package and not the linux-virt package as distributed by Minimos. See How to fix? for Minimos:latest relevant fixed versions and status.

In the Linux kernel, the following vulnerability has been resolved:

USB: gadget: f_midi: f_midi_complete to call queue_work

When using USB MIDI, a lock is attempted to be acquired twice through a re-entrant call to f_midi_transmit, causing a deadlock.

Fix it by using queue_work() to schedule the inner f_midi_transmit() via a high priority work queue from the completion handler.

CVSS Base Scores

version 3.1