CVE-2025-21838

CVE-2025-21838: vulnerability in Linux

usb: gadget: core: flush gadget workqueue after device removal

Published · Updated

3Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackepss 0.2%
exploitation probability
0.2%top 90% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: core: flush gadget workqueue after device removal device_del() can lead to new work being scheduled in gadget->work workqueue. This is observed, for example, with the dwc3 driver with the following call stack: device_del() gadget_unbind_driver() usb_gadget_disconnect_locked() dwc3_gadget_pullup() dwc3_gadget_soft_disconnect() usb_gadget_set_state() schedule_work(&gadget->work) Move flush_work() after device_del() to ensure the workqueue is cleaned up.
Affected products
Linux · Linux
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References
https://git.kernel.org/stable/c/399a45e5237ca14037120b1b895bd38a3b4492eahttps://git.kernel.org/stable/c/859cb45aefa6de823b2fa7f229fe6d9562c9f3b7https://git.kernel.org/stable/c/97695b5a1b5467a4f91194db12160f56da445dfehttps://git.kernel.org/stable/c/e3bc1a9a67ce33a2e761e6e7b7c2afc6cb9b7266https://git.kernel.org/stable/c/f894448f3904d7ad66fecef8f01fe0172629e091https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html