CVE-2024-41063
Bluetooth: hci_core: cancel all works upon hci_unregister_dev()
Reported by linux · Published July 29, 2024
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_core: cancel all works upon hci_unregister_dev() syzbot is reporting that calling hci_release_dev() from hci_error_reset() due to hci_dev_put() from hci_error_reset() can cause deadlock at destroy_workqueue(), for hci_error_reset() is called from hdev->req_workqueue which destroy_workqueue() needs to flush. We need to make sure that hdev->{rx_work,cmd_work,tx_work} which are queued into hdev->workqueue and hdev->{power_on,error_reset} which are queued into hdev->req_workqueue are no longer running by the moment destroy_workqueue(hdev->workqueue); destroy_workqueue(hdev->req_workqueue); are called from hci_release_dev(). Call cancel_work_sync() on these work items from hci_unregister_dev() as soon as hdev->list is removed from hci_dev_list.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| Linux | Linux | ddeda6ca5f218b668b560d90fc31ae469adbfd92, d6cbce18370641a21dd889e8613d8153df15eb39, d2ce562a5aff1dcd0c50d9808ea825ef90da909f, 9cfc84b1d464cc024286f42a090718f9067b80ed, 96600c2e5ee8213dbab5df1617293d8e847bb4fa, 6.8, 6.6.42, 6.1.101, 5.15.164, 5.10.223, 5.4.281, 48542881997e17b49dc16b93fe910e0cfcf7a9f9, 4.19.319, 3f939bd73fed12dddc2a32a76116c19ca47c7678, 0d151a103775dd9645c78c97f77d6e2a5298d913 |
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | e0b278650f07acf2e0932149183458468a731c03, 98fb98fd37e42fd4ce13ff657ea64503e24b6090, 6dd0a9dfa99f8990a08eb8fdd8e79bee31c7d8e2 |
| Linux | Linux | 6.8, 0, 4.19.319 |
| Linux | Linux | 6.7.9, 6.9.11, 6.10 |
| linux | linux_kernel | 5.15.151, 6.1.81, 6.6.21 |
Timeline
- Jul 29, 2024 CVE Published
- Jul 30, 2024 EPSS Score (30 in total, the first dated here)
- Oct 4, 2024 Coalition ESS Score (19 in total, the first dated here)
- Jan 6, 2025 CVE Updated
- Jan 7, 2026 Security Advisory (374 in total, the first dated here)
- Mar 30, 2026 Distribution Patch (256 in total, the first dated here)
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