CVE-2026-63974
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: Set HCI_CMD_DRAIN_WORKQUEUE during device close Since hci_dev_close_sync() can now be called during the reset path, we should also set HCI_CMD_DRAIN_WORKQUEUE. This avoids queuing timeouts while the hdev workqueue is being drained.
Affected versions
Linux kernel versions
5.18.18,
5.19.2,
6.0
and later are affected. Fixed in
6.12.93,
6.18.35,
7.0.12,
7.1
and their respective stable series.
References
4 totalFrequently asked questions
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What is CVE-2026-63974?
CVE-2026-63974 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.18.18 onward and has been patched in 6.12.93, 6.18.35, 7.0.12 and others. CVE-2026-63974 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-63974?
Yes — CVE-2026-63974 has been patched. Fixed versions include 6.12.93, 6.18.35, 7.0.12 and others. If you are running Linux kernel 5.18.18 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-63974 actively exploited?
No — CVE-2026-63974 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.