CVE-2026-90021usb: gadget: f_midi: initialize work in f_midi_alloc()
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No exploitation reported and no EPSS estimate yet.
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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().
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 8653d71ce3763aedcf3d2331f59beda3fecd79e4 builds before 3d8b11255e632170f32f1925bfcaf96331f36317; 8653d71ce3763aedcf3d2331f59beda3fecd79e4 builds before 02ac76f27db23ef652358458c272d9d2d6f51167; from 8653d71ce3763aedcf3d2331f59beda3fecd79e4 before 858576de6b2f5166b08dae803f0fd0766dcb3002; 8653d71ce3763aedcf3d2331f59beda3fecd79e4 builds before 7e07d3e4c389217d7d7171d80edf2e23ac70f1ea; 89019ab7a64fcdf98a2ba7799e5c6aff58d4a05d; 3635523e9b96213969693c320302d536774d8e9b; from 5.4.291 before 5.5; from 5.10.235 before 5.11 | CNA record |
References
- https://git.kernel.org/stable/c/3d8b11255e632170f32f1925bfcaf96331f36317
- https://git.kernel.org/stable/c/02ac76f27db23ef652358458c272d9d2d6f51167
- https://git.kernel.org/stable/c/858576de6b2f5166b08dae803f0fd0766dcb3002
- https://git.kernel.org/stable/c/7e07d3e4c389217d7d7171d80edf2e23ac70f1ea
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.