CVE-2026-74302

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.

Score

CVSS 3.1 7.8 High

Status

Received - 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-08-15

Last modified

2026-10-21

Affected products

• Linux Kernel (Linux)

References

• https://git.kernel.org/stable/c/bce2eec05bce548b548aca52c1834540f97d5d60
• https://git.kernel.org/stable/c/48c7ad6afcc58c2cda11fed39791708103b6a644
• https://git.kernel.org/stable/c/a0fd1086a57b982f8c24ae4ab165c2af39fe1735
• https://git.kernel.org/stable/c/672d52d9412252e61b8de8d773ccdf5a277cf540
• https://git.kernel.org/stable/c/5edcc018fa6e80b2c478454a4a8229c23d67c181