VYPR
← All advisories
Unrated severityNVD Advisory· Published Sep 19, 2025· Updated Jan 14, 2026

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

CVE-2025-39861

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

112

Patches

Vulnerability mechanics

References

4

News mentions

0

No linked articles in our index yet.