Linux Linux Kernel
CVE-2026-64408
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: bnep: pin L2CAP connection during netdev registration bnep_add_connection() reads the L2CAP connection without holding the channel lock, then passes its HCI device to register_netdev(). Controller teardown can clear and release that connection concurrently, leaving the network device registration path to dereference a freed parent device. Take a reference to the L2CAP connection while holding the channel lock. Retain it until register_netdev() has taken the parent device reference.
What this means for your business
- It affects Linux Kernel. It matters if your company, or a supplier that handles your data, runs it.
- An attacker can use it from inside the same network, without a login, and without anyone at your company clicking anything.
- FIRST's prediction model gives it a 0.4% chance of attack attempts being seen in the next 30 days, ranking above 32% of all known flaws.
What to do
- 1Check whether your company or your suppliers run Linux Kernel, and which version. The affected versions are listed further down this page.
- 2If you do, apply the vendor's fix. A patch or vendor advisory has been published.
Fastnexa security experts
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Scoring
- CVSS
- 8.8 (v3.1)
- Vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- Assigned by
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Dates
- Published
- 2026-07-25
- Last modified
- 2026-09-04
- Sources
- NVD
Affected products
- Linux Linux Kernel3.13 - 5.10.261, 5.11 - 5.15.212, 5.16 - 6.1.178, 6.2 - 6.6.145, 6.7 - 6.12.96, 6.13 - 6.18.39, 6.19 - 7.1.4, 7.2
As listed in the NVD configuration data. Not a statement about your estate.
References
- https://git.kernel.org/stable/c/390b5db3ff8745187f094c4e915663b7b1f98944
- https://git.kernel.org/stable/c/46a88784c4c9b96954dd86f747ce93f65efa1302
- https://git.kernel.org/stable/c/551ae773ec64045b4e72099132654887e0270bcc
- https://git.kernel.org/stable/c/563a8573047182f550b1e1e030615755cd8c41da
- https://git.kernel.org/stable/c/a6b22dbd80926556290ad2243be25218d6956a19
- https://git.kernel.org/stable/c/ae215c5b6422d8eda443b861b124bd1be6969c31
- https://git.kernel.org/stable/c/bb067a99a0356196c0b89a95721985485ebce5a5
- https://git.kernel.org/stable/c/df22adc7eafc22e651561813c11dc51a796b12ee