Vulnerability Description
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.
CVSS Score
HIGH
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
FAQ
What is CVE-2026-64408?
CVE-2026-64408 is a vulnerability with a CVSS score of 8.8 (HIGH). 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 ...
How severe is CVE-2026-64408?
CVE-2026-64408 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-64408?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.