{"id":"CVE-2026-90021","published":"2026-09-16T11:17:15.030","lastModified":"2026-09-16T11:17:15.030","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_midi: initialize work in f_midi_alloc()\n\nf_midi_alloc initializes free_ref to 1 and it can only be incremented\nwhen a sound card is registered via f_midi_register_card().\nf_midi_register_card() is only called in f_midi_bind() which actually\nperforms INIT_WORK. If f_midi_bind() is never run, work is not\ninitialized and the if condition in f_midi_free becomes true,\nthis results in a warning later in __flush_work as work->func = 0.\nFix this by moving INIT_WORK from f_midi_bind() to f_midi_alloc().","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/02ac76f27db23ef652358458c272d9d2d6f51167","tags":[]},{"url":"https://git.kernel.org/stable/c/3d8b11255e632170f32f1925bfcaf96331f36317","tags":[]},{"url":"https://git.kernel.org/stable/c/7e07d3e4c389217d7d7171d80edf2e23ac70f1ea","tags":[]},{"url":"https://git.kernel.org/stable/c/858576de6b2f5166b08dae803f0fd0766dcb3002","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}