Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_core: Fix UAF in hci_unregister_dev() hci_unregister_dev() does not disable cmd_timer and ncmd_timer before the hci_dev structure is freed. If a timeout fires during device teardown, the callback dereferences freed memory (including the hdev->reset function pointer), leading to a use-after-free. Add disable_delayed_work_sync() calls alongside the existing disable_work_sync() calls to ensure both timers are fully quiesced before teardown proceeds.
References6
- git.kernel.org/stable/c/48c7ad6afcc58c2cda11fed39791708103b6a644
- git.kernel.org/stable/c/5edcc018fa6e80b2c478454a4a8229c23d67c181
- git.kernel.org/stable/c/672d52d9412252e61b8de8d773ccdf5a277cf540
- git.kernel.org/stable/c/a0fd1086a57b982f8c24ae4ab165c2af39fe1735
- git.kernel.org/stable/c/bce2eec05bce548b548aca52c1834540f97d5d60
- git.kernel.org/stable/c/c277f624cd99e4f0e0223fd039b7615feea4afdc
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 2 · as of 11 November 2026
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