CVE-2025-39861 (GCVE-0-2025-39861)

Vulnerability from cvelistv5 – Published: 2025-09-19 15:26 – Updated: 2026-01-14 19:33
VLAI?
Title
Bluetooth: vhci: Prevent use-after-free by removing debugfs files early
Summary
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 ?
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: ab4e4380d4e158486e595013a2635190e07e28ce , < bd75eba88e88d7b896b0c737b02a74a12afc235f (git)
Affected: ab4e4380d4e158486e595013a2635190e07e28ce , < 1503756fffe76d5aea2371a4b8dee20c3577bcfd (git)
Affected: ab4e4380d4e158486e595013a2635190e07e28ce , < 7cc08f2f127b9a66f46ea918e34353811a7cb378 (git)
Affected: ab4e4380d4e158486e595013a2635190e07e28ce , < 28010791193a4503f054e8d69a950ef815deb539 (git)
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    Linux Linux Affected: 6.4
Unaffected: 0 , < 6.4 (semver)
Unaffected: 6.6.105 , ≤ 6.6.* (semver)
Unaffected: 6.12.46 , ≤ 6.12.* (semver)
Unaffected: 6.16.6 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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