CVE-2026-90021

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinux8653d71ce3763aedcf3d2331f59beda3fecd79e4 < 3d8b11255e632170f32f1925bfcaf96331f36317affected
LinuxLinux8653d71ce3763aedcf3d2331f59beda3fecd79e4 < 02ac76f27db23ef652358458c272d9d2d6f51167affected
LinuxLinux8653d71ce3763aedcf3d2331f59beda3fecd79e4 < 858576de6b2f5166b08dae803f0fd0766dcb3002affected
LinuxLinux8653d71ce3763aedcf3d2331f59beda3fecd79e4 < 7e07d3e4c389217d7d7171d80edf2e23ac70f1eaaffected
LinuxLinux89019ab7a64fcdf98a2ba7799e5c6aff58d4a05daffected
LinuxLinux3635523e9b96213969693c320302d536774d8e9baffected
LinuxLinux5.4.291 < 5.5affected
LinuxLinux5.10.235 < 5.11affected
LinuxLinux5.12affected
LinuxLinux0 < 5.12unaffected
LinuxLinux6.12.110 <= 6.12.*unaffected
LinuxLinux6.18.51 <= 6.18.*unaffected
LinuxLinux7.2.5 <= 7.2.*unaffected
LinuxLinux7.3-rc2 <= *unaffected

Weaknesses

References