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Vulnerabilities

Vulnerability · CVE-2026-63974

Bluetooth: hci_sync: Set HCI_CMD_DRAIN_WORKQUEUE during device close

Published Jul 19, 2026 · catalog updated Oct 21, 2026 · Bluetooth: hci_sync: Set HCI_CMD_DRAIN_WORKQUEUE

Check if you run it

No confirmed exploitation is on record for CVE-2026-63974. EPSS is 0.33%. Act only if a listed version of Bluetooth: hci_sync: Set HCI_CMD_DRAIN_WORKQUEUE is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Bluetooth: hci_sync: Set HCI_CMD_DRAIN_WORKQUEUE).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.33%
Remediation
Advisory link
Affected products
Linux Kernel

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • Linux Kernel6.0.0 → 6.12.93; 6.13.0 → 6.18.35; 6.19.0 → 7.0.12

How to fix CVE-2026-63974

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-63974. EPSS is 0.33%. Act only if a listed version of Bluetooth: hci_sync: Set HCI_CMD_DRAIN_WORKQUEUE is installed.

Which versions are affected?

Compare what you have installed with Kernel 6.0.0 → 6.12.93; 6.13.0 → 6.18.35; 6.19.0 → 7.0.12. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.33%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Jul 19, 2026 · OpenSSF OSV / OSV Scanner

    Detected

    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.

  2. Oct 21, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    Kernel fixed in 6.12.93; Kernel fixed in 6.18.35; Kernel fixed in 7.0.12

  3. Oct 21, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    Kernel fixed in 6.12.93; 6.13.0

  4. Oct 21, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    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.

Sources

References

Freshness

Last verified in this catalog Oct 23, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.