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.

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
0d151a103775dd9645c78c97f77d6e2a5298d913 affected < 48c7ad6afcc58c2cda11fed39791708103b6a644
0d151a103775dd9645c78c97f77d6e2a5298d913 affected < a0fd1086a57b982f8c24ae4ab165c2af39fe1735
0d151a103775dd9645c78c97f77d6e2a5298d913 affected < 672d52d9412252e61b8de8d773ccdf5a277cf540
0d151a103775dd9645c78c97f77d6e2a5298d913 affected < 5edcc018fa6e80b2c478454a4a8229c23d67c181
48542881997e17b49dc16b93fe910e0cfcf7a9f9 affected —
9cfc84b1d464cc024286f42a090718f9067b80ed affected —
ddeda6ca5f218b668b560d90fc31ae469adbfd92 affected —
d2ce562a5aff1dcd0c50d9808ea825ef90da909f affected —
96600c2e5ee8213dbab5df1617293d8e847bb4fa affected —
d6cbce18370641a21dd889e8613d8153df15eb39 affected —
3f939bd73fed12dddc2a32a76116c19ca47c7678 affected —
4.19.319 affected < 4.20
5.4.281 affected < 5.5
5.10.223 affected < 5.11
5.15.164 affected < 5.16
6.1.101 affected < 6.2
6.6.42 affected < 6.7
6.9.11 affected < 6.10
Linux Linux affected
Version Status Constraints
6.10 affected —
0 unaffected < 6.10
6.12.97 unaffected ≤ 6.12.*
6.18.40 unaffected ≤ 6.18.*
7.1.5 unaffected ≤ 7.1.*
7.2-rc1 unaffected ≤ *

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Workaround

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References
Link Providers
https://git.kernel.org/stable/c/48c7ad6afcc58c2cda11fed39791708103b6a644 cve-icon cve-icon
https://git.kernel.org/stable/c/5edcc018fa6e80b2c478454a4a8229c23d67c181 cve-icon cve-icon
https://git.kernel.org/stable/c/672d52d9412252e61b8de8d773ccdf5a277cf540 cve-icon cve-icon
https://git.kernel.org/stable/c/a0fd1086a57b982f8c24ae4ab165c2af39fe1735 cve-icon cve-icon
History

Sat, 15 Aug 2026 06:15:00 +0000

Type Values Removed Values Added
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.
Title Bluetooth: hci_core: Fix UAF in hci_unregister_dev()
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-08-15T05:58:04.638Z

Reserved: 2026-08-15T05:44:03.882Z

Link: CVE-2026-74302

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-15T06:22:29.813

Modified: 2026-08-15T06:22:29.813

Link: CVE-2026-74302

cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses

No weakness.