CVE-2025-39861

HIGH EPSS 3.9%
Published Sep 19, 20259mo ago · Modified Jun 17, 20262w ago
7.8 CVSS 3.1
High
Find Similar
Published Sep 19, 2025 9mo ago
Last Modified Jun 17, 2026 2w 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.

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
3.9% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 7

VendorProductVersionRange
linuxlinux_kernel*≥6.4  –  <6.6.105
linuxlinux_kernel*≥6.7  –  <6.12.46
linuxlinux_kernel*≥6.13  –  <6.16.6
linuxlinux_kernel6.17any
linuxlinux_kernel6.17any
linuxlinux_kernel6.17any
linuxlinux_kernel6.17any

References 4

  • git.kernel.org https://git.kernel.org/stable/c/1503756fffe76d5aea2371a4b8dee20c3577bcfd
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/28010791193a4503f054e8d69a950ef815deb539
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7cc08f2f127b9a66f46ea918e34353811a7cb378
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/bd75eba88e88d7b896b0c737b02a74a12afc235f
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/1503756fffe76d5aea2371a4b8dee20c3577bcfd
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/28010791193a4503f054e8d69a950ef815deb539
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7cc08f2f127b9a66f46ea918e34353811a7cb378
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/bd75eba88e88d7b896b0c737b02a74a12afc235f
    Patch