Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.4, < 6.6.105 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/1503756fffe76d5aea2371a4b8dee20c3577bcfdPatch
- https://git.kernel.org/stable/c/28010791193a4503f054e8d69a950ef815deb539Patch
- https://git.kernel.org/stable/c/7cc08f2f127b9a66f46ea918e34353811a7cb378Patch
- https://git.kernel.org/stable/c/bd75eba88e88d7b896b0c737b02a74a12afc235fPatch
FAQ
What is CVE-2025-39861?
CVE-2025-39861 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 functi...
How severe is CVE-2025-39861?
CVE-2025-39861 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-39861?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.