CVE-2025-21859: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• Linux Linux Kernel: from 3.2, before 6.1.130 (fixed in 6.1.130); from 6.2, before 6.6.80 (fixed in 6.6.80); from 6.7, before 6.12.17 (fixed in 6.12.17); from 6.13, before 6.13.5 (fixed in 6.13.5); version 6.14 only

Published 2025-03-12. Last modified 2026-06-17.