CVE-2026-98109: In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_core: Fix race condition d

Q: How do I fix CVE-2026-98109?

linux kernel: upgrade to 6.5, 6.12.111, 6.18.53, 7.2.7. Exact commands for each OS are on this page.

Q: Is CVE-2026-98109 being exploited?

CVE-2026-98109 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-98109 affect?

CVE-2026-98109 affects linux kernel. Severity is medium (CVSS 4.7). In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_core: Fix race condition during device registration In hci_register_dev(), the power_on work item is queued to hdev->req_workqueue before initializing hdev

Routine

MEDIUM 4.7WATCHLISTUPGRADE

CVE-2026-98109 is a medium-severity flaw (CVSS 4.7) affecting linux kernel. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_core: Fix race condition during device registration In hci_register_dev(), the power_on work item is queued to hdev->req_workqueue before initializing hdev->adv_monitors_idr and registering the MSFT extension via msft_register(). For devices marked with quirks such as HCI_QUIRK_RAW_DEVICE, the HCI_UNCONFIGURED flag is set on the device. When the power_on work ite

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	4.7 (Medium)
Attack vector	Local
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.1% (top 100%)
CISA exploited list	No
Weakness	CWE-362
Published	2026-09-25
Last modified	2026-10-19

Publisher (CNA): kernel.org · Vendor: linux

Last updated 2026-10-19 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-25 11:17 UTCPublished CVE record published
2026-10-19 10:18 UTCUpdated Record last modified

linux linux kernel UPGRADE

Affected: >= 6.4.16 and < 6.5 · >= 6.5.3 and < 6.12.111 · >= 6.13 and < 6.18.53 · >= 6.19 and < 7.2.7 · 7.3 rc1

Fixed in: 6.5, 6.12.111, 6.18.53, 7.2.7

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-98109?

linux kernel: upgrade to 6.5, 6.12.111, 6.18.53, 7.2.7. Exact commands for each OS are on this page.

Is CVE-2026-98109 being exploited?

CVE-2026-98109 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-98109 affect?

CVE-2026-98109 affects linux kernel. Severity is medium (CVSS 4.7). In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_core: Fix race condition during device registration In hci_register_dev(), the power_on work item is queued to hdev->req_workqueue before initializing hdev

How urgent is CVE-2026-98109?

Priority 22/100. On your watchlist

Software pages

Linux kernel vulnerabilities · Bluetooth vulnerabilities

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References

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