CVE-2026-74302
Bluetooth: hci_core: Fix UAF in hci_unregister_dev()
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.
INFO
Published Date :
Aug. 15, 2026, 6:22 a.m.
Last Modified :
Aug. 15, 2026, 6:22 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products
The following products are affected by CVE-2026-74302
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Disable cmd_timer and ncmd_timer before freeing memory.
- Add disable_delayed_work_sync() calls.
- Ensure timers are quiescent before teardown.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-74302.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-74302 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-74302
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-74302 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-74302 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 15, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '0d151a103775dd9645c78c97f77d6e2a5298d913', 'lessThan': '48c7ad6afcc58c2cda11fed39791708103b6a644', 'versionType': 'git'}, {'status': 'affected', 'version': '0d151a103775dd9645c78c97f77d6e2a5298d913', 'lessThan': 'a0fd1086a57b982f8c24ae4ab165c2af39fe1735', 'versionType': 'git'}, {'status': 'affected', 'version': '0d151a103775dd9645c78c97f77d6e2a5298d913', 'lessThan': '672d52d9412252e61b8de8d773ccdf5a277cf540', 'versionType': 'git'}, {'status': 'affected', 'version': '0d151a103775dd9645c78c97f77d6e2a5298d913', 'lessThan': '5edcc018fa6e80b2c478454a4a8229c23d67c181', 'versionType': 'git'}, {'status': 'affected', 'version': '48542881997e17b49dc16b93fe910e0cfcf7a9f9', 'versionType': 'git'}, {'status': 'affected', 'version': '9cfc84b1d464cc024286f42a090718f9067b80ed', 'versionType': 'git'}, {'status': 'affected', 'version': 'ddeda6ca5f218b668b560d90fc31ae469adbfd92', 'versionType': 'git'}, {'status': 'affected', 'version': 'd2ce562a5aff1dcd0c50d9808ea825ef90da909f', 'versionType': 'git'}, {'status': 'affected', 'version': '96600c2e5ee8213dbab5df1617293d8e847bb4fa', 'versionType': 'git'}, {'status': 'affected', 'version': 'd6cbce18370641a21dd889e8613d8153df15eb39', 'versionType': 'git'}, {'status': 'affected', 'version': '3f939bd73fed12dddc2a32a76116c19ca47c7678', 'versionType': 'git'}, {'status': 'affected', 'version': '4.19.319', 'lessThan': '4.20', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.4.281', 'lessThan': '5.5', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.10.223', 'lessThan': '5.11', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.15.164', 'lessThan': '5.16', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.1.101', 'lessThan': '6.2', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.6.42', 'lessThan': '6.7', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.9.11', 'lessThan': '6.10', 'versionType': 'semver'}], 'programFiles': ['net/bluetooth/hci_core.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.10'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.10', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/bluetooth/hci_core.c'], 'defaultStatus': 'affected'}] 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. Added Reference https://git.kernel.org/stable/c/48c7ad6afcc58c2cda11fed39791708103b6a644 Added Reference https://git.kernel.org/stable/c/5edcc018fa6e80b2c478454a4a8229c23d67c181 Added Reference https://git.kernel.org/stable/c/672d52d9412252e61b8de8d773ccdf5a277cf540 Added Reference https://git.kernel.org/stable/c/a0fd1086a57b982f8c24ae4ab165c2af39fe1735