In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: fix memory leak in error path of hci_alloc_dev()

Early failures in Bluetooth HCI UART configuration leak SRCU percpu
memory.

When device initialization fails before hci_register_dev() completes,
the HCI_UNREGISTER flag is never set. As a result, when the device
reference count reaches zero, bt_host_release() evaluates this flag as
false and falls back to a direct kfree(hdev).

Because hci_release_dev() is bypassed, the SRCU struct initialized
early in hci_alloc_dev() is never cleaned up, resulting in a leak of
percpu memory.

Fix the leak by explicitly calling cleanup_srcu_struct() in the
fallback (unregistered) branch of bt_host_release() before freeing
the device.

https://git.kernel.org/stable/c/0622e527a31d4b44737fed5c1a2ac1fc2cfb5184

https://git.kernel.org/stable/c/37b3009bf5976e8ab77c8b9a9bc3bbd7ff49e37f

https://git.kernel.org/stable/c/5b7dfca6f852e6b9d809fd0263b5427cc9fb33fd

https://git.kernel.org/stable/c/bc2efe73c194a74839d7cf57b63880d97e21d309

https://git.kernel.org/stable/c/c016118b9e51eeaf5bc93850d4c455a3b583c0aa

https://git.kernel.org/stable/c/ce4b4cac3c5749b6aa75e62e2991ae2263f2f889

https://git.kernel.org/stable/c/f82799407a50af7bcacacf09cc9b279af8fe9b81

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