CVE-2025-39861 - Bluetooth: vhci: Prevent use-after-free by removing debugfs files early

CVE-2025-39861 - Bluetooth: vhci: Prevent use-after-free by removing debugfs files early

https://cvefeed.io/rssfeed/latest.atom / Fri, 09/19/2025 - 17:40
CVE ID : CVE-2025-39861
Published : Sept. 19, 2025, 3:26 p.m. | 13 minutes ago
Description : In the Linux kernel, the following vulnerability has been resolved: Bluetooth: vhci: Prevent use-after-free by removing debugfs files early Move the creation of debugfs files into a dedicated function, and ensure they are explicitly removed during vhci_release(), before associated data structures are freed. Previously, debugfs files such as "force_suspend", "force_wakeup", and others were created under hdev->debugfs but not removed in vhci_release(). Since vhci_release() frees the backing vhci_data structure, any access to these files after release would result in use-after-free errors. Although hdev->debugfs is later freed in hci_release_dev(), user can access files after vhci_data is freed but before hdev->debugfs is released.
Severity: 0.0 | NA
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