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CVE-2026-63974

8.8 · HIGH

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 re…

Published Jul 19, 2026EPSS 0.32%

Overview

CVE-2026-63974 is a high-severity vulnerability. It was published on July 19, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/47330cc875b36a1cf7b3543cb2cf90a7c603ce0eRefgit.kernel.org/stable/c/525daaea459fc215f432de1b8debbd9144bf97b0Refgit.kernel.org/stable/c/60bceb9a4c693e68cc90ba4b2dfb9e000e8638ffRefgit.kernel.org/stable/c/9cebe4680bb9a72f80c6541eb24af06db7a1fbc9

How CyberStrike helps

Frequently asked questions

What is CVE-2026-63974?

CVE-2026-63974 is a high-severity vulnerability. It was published on July 19, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2026-63974?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-63974?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-63974?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-63974 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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