CVE-2026-90021
usb: gadget: f_midi: initialize work in f_midi_alloc()
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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().
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Sep 16, 2026 |
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Affected Versions
Linux / Linux
8653d71ce3763aedcf3d2331f59beda3fecd79e4 < 3d8b11255e632170f32f1925bfcaf96331f36317 8653d71ce3763aedcf3d2331f59beda3fecd79e4 < 02ac76f27db23ef652358458c272d9d2d6f51167 8653d71ce3763aedcf3d2331f59beda3fecd79e4 < 858576de6b2f5166b08dae803f0fd0766dcb3002 8653d71ce3763aedcf3d2331f59beda3fecd79e4 < 7e07d3e4c389217d7d7171d80edf2e23ac70f1ea 89019ab7a64fcdf98a2ba7799e5c6aff58d4a05d 3635523e9b96213969693c320302d536774d8e9b 5.4.291 < 5.5 5.10.235 < 5.11
Linux / Linux
5.12
References
git.kernel.org: https://git.kernel.org/stable/c/3d8b11255e632170f32f1925bfcaf96331f36317 git.kernel.org: https://git.kernel.org/stable/c/02ac76f27db23ef652358458c272d9d2d6f51167 git.kernel.org: https://git.kernel.org/stable/c/858576de6b2f5166b08dae803f0fd0766dcb3002 git.kernel.org: https://git.kernel.org/stable/c/7e07d3e4c389217d7d7171d80edf2e23ac70f1ea