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Oracle Linux: (CVE-2024-26801) (Multiple Advisories): kernel security and bug fix update

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Oracle Linux: (CVE-2024-26801) (Multiple Advisories): kernel security and bug fix update

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
04/04/2024
Created
07/04/2024
Added
07/03/2024
Modified
07/09/2024

Description

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

Bluetooth: Avoid potential use-after-free in hci_error_reset

While handling the HCI_EV_HARDWARE_ERROR event, if the underlying

BT controller is not responding, the GPIO reset mechanism would

free the hci_dev and lead to a use-after-free in hci_error_reset.

Here's the call trace observed on a ChromeOS device with Intel AX201:

queue_work_on+0x3e/0x6c

__hci_cmd_sync_sk+0x2ee/0x4c0 [bluetooth <HASH:3b4a6>]

? init_wait_entry+0x31/0x31

__hci_cmd_sync+0x16/0x20 [bluetooth <HASH:3b4a 6>]

hci_error_reset+0x4f/0xa4 [bluetooth <HASH:3b4a 6>]

process_one_work+0x1d8/0x33f

worker_thread+0x21b/0x373

kthread+0x13a/0x152

? pr_cont_work+0x54/0x54

? kthread_blkcg+0x31/0x31

ret_from_fork+0x1f/0x30

This patch holds the reference count on the hci_dev while processing

a HCI_EV_HARDWARE_ERROR event to avoid potential crash.

Solution(s)

  • oracle-linux-upgrade-kernel

References

  • ELSA-2024-4349
  • CVE-2024-26801

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