CVE-2026-74302
High
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.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Linux
PublishedAug 15, 2026
First seenAug 15, 2026
How to fix
Update
- Linux Linuxc277f624cd99e4f0e0223fd039b7615feea4afdc, bce2eec05bce548b548aca52c1834540f97d5d60, 48c7ad6afcc58c2cda11fed39791708103b6a644, a0fd1086a57b982f8c24ae4ab165c2af39fe1735, 672d52d9412252e61b8de8d773ccdf5a277cf540, 5edcc018fa6e80b2c478454a4a8229c23d67c181, 6.1.191, 6.6.160, 4.20, 5.5, 5.11, 5.16, 6.10 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 96600c2e5ee8213dbab5df1617293d8e847bb4fa ≤ v < c277f624cd99e4f0e0223fd039b7615feea4afdc, d6cbce18370641a21dd889e8613d8153df15eb39 ≤ v < bce2eec05bce548b548aca52c1834540f97d5d60, 0d151a103775dd9645c78c97f77d6e2a5298d913 ≤ v < 48c7ad6afcc58c2cda11fed39791708103b6a644, 0d151a103775dd9645c78c97f77d6e2a5298d913 ≤ v < a0fd1086a57b982f8c24ae4ab165c2af39fe1735, 0d151a103775dd9645c78c97f77d6e2a5298d913 ≤ v < 672d52d9412252e61b8de8d773ccdf5a277cf540, 0d151a103775dd9645c78c97f77d6e2a5298d913 ≤ v < 5edcc018fa6e80b2c478454a4a8229c23d67c181, 48542881997e17b49dc16b93fe910e0cfcf7a9f9, 9cfc84b1d464cc024286f42a090718f9067b80ed, ddeda6ca5f218b668b560d90fc31ae469adbfd92, d2ce562a5aff1dcd0c50d9808ea825ef90da909f, 3f939bd73fed12dddc2a32a76116c19ca47c7678, 6.1.101 ≤ v < 6.1.191, 6.6.42 ≤ v < 6.6.160, 4.19.319 ≤ v < 4.20, 5.4.281 ≤ v < 5.5, 5.10.223 ≤ v < 5.11, 5.15.164 ≤ v < 5.16, 6.9.11 ≤ v < 6.10, 6.10 | c277f624cd99e4f0e0223fd039b7615feea4afdc, bce2eec05bce548b548aca52c1834540f97d5d60, 48c7ad6afcc58c2cda11fed39791708103b6a644, a0fd1086a57b982f8c24ae4ab165c2af39fe1735, 672d52d9412252e61b8de8d773ccdf5a277cf540, 5edcc018fa6e80b2c478454a4a8229c23d67c181, 6.1.191, 6.6.160, 4.20, 5.5, 5.11, 5.16, 6.10 |
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