CVE-2026-90021: usb: gadget: f_midi: initialize work in f_midi_alloc()

Description

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_midi: initialize work in f_midi_alloc() f_midi_alloc initializes free_ref to 1 and it can only be incremented when a sound card is registered via f_midi_register_card(). f_midi_register_card() is only called in f_midi_bind() which actually performs INIT_WORK. If f_midi_bind() is never run, work is not initialized and the if condition in f_midi_free becomes true, this results in a warning later in __flush_work as work->func = 0. Fix this by moving INIT_WORK from f_midi_bind() to f_midi_alloc().

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

8653d71ce3763aedcf3d2331f59beda3fecd79e4 to < c76e82b026a28c348e5d841922aa73db36eca1d3affected
8653d71ce3763aedcf3d2331f59beda3fecd79e4 to < 13e9f5a91360952b9b5bbc2367fc29d4a4ff2824affected
8653d71ce3763aedcf3d2331f59beda3fecd79e4 to < 3d8b11255e632170f32f1925bfcaf96331f36317affected
8653d71ce3763aedcf3d2331f59beda3fecd79e4 to < 02ac76f27db23ef652358458c272d9d2d6f51167affected
8653d71ce3763aedcf3d2331f59beda3fecd79e4 to < 858576de6b2f5166b08dae803f0fd0766dcb3002affected
8653d71ce3763aedcf3d2331f59beda3fecd79e4 to < 7e07d3e4c389217d7d7171d80edf2e23ac70f1eaaffected
89019ab7a64fcdf98a2ba7799e5c6aff58d4a05daffected
3635523e9b96213969693c320302d536774d8e9baffected
5.4.291 to < 5.5affected
5.10.235 to < 5.11affected

Linux Linux

Default version status: affected

5.12affected
0 to < 5.12unaffected
6.1.191 to ≤ 6.1.*unaffected
6.6.160 to ≤ 6.6.*unaffected
6.12.110 to ≤ 6.12.*unaffected
6.18.51 to ≤ 6.18.*unaffected
7.2.5 to ≤ 7.2.*unaffected
7.3 to ≤ *unaffected

CVE-2026-90021

usb: gadget: f_midi: initialize work in f_midi_alloc()

Description

Affected products

Linux Linux

Linux Linux

References