Bluetooth: btusb: reorder cleanup in btusb_disconnect to avoid UAF
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 4 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btusb: reorder cleanup in btusb_disconnect to avoid UAF There is a KASAN: slab-use-after-free read in btusb_disconnect(). Calling "usb_driver_release_interface(&btusb_driver, data->intf)" will free the btusb data associated with the interface. The same data is then used later in the function, hence the UAF. Fix by moving the accesses to btusb data to before the data is free'd.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 4.11 and later | 5.4.302, 5.10.247, 5.15.197, 6.1.159, 6.6.117, 6.12.59, 6.17.9, 6.18 | Patch available | CNA |
- Linux VendorLinux Affected 4.11 and later Fixed in 5.4.302, 5.10.247, 5.15.197, 6.1.159, 6.6.117, 6.12.59, 6.17.9, 6.18 Patch available CNA
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.4.302, 5.10.247, 5.15.197, 6.1.159, 6.6.117, 6.12.59, 6.17.9, 6.18
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
Not affected: 1 product
- Red Hat Enterprise Linux 7
Timeline
- 2026-10-02 Threatist record created from CVE-2025-40283
- 2026-10-03 Alias added: GHSA-x57x-cxmg-52pw
- 2026-10-16 CISA SSVC decision points changed
References
Other 8
- https://git.kernel.org/stable/c/297dbf87989e09af98f81f2bcb938041785557e8
- https://git.kernel.org/stable/c/f858f004bc343a7ae9f2533bbb2a3ab27428532f
- https://git.kernel.org/stable/c/7a6d1e740220ff9dfcb6a8c994d6ba49e76db198
- https://git.kernel.org/stable/c/5dc00065a0496c36694afe11e52a5bc64524a9b8
- https://git.kernel.org/stable/c/1c28c1e1522c773a94e26950ffb145e88cd9834b
- https://git.kernel.org/stable/c/95b9b98c93b1c0916a3d4cf4540b7f5d69145a0d
- https://git.kernel.org/stable/c/a2610ecd9fd5708be8997ca8f033e4200c0bb6af
- https://git.kernel.org/stable/c/23d22f2f71768034d6ef86168213843fc49bf550
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Sources
- CVE-2025-40283 · CVE Program
- CVE-2025-40283 · NVD
- FIRST EPSS
- GHSA-x57x-cxmg-52pw · GitHub Advisory Database · CC BY 4.0
- CVE-2025-40283 · Red Hat security data · CC BY 4.0
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