Bluetooth: hci_sync: hold hdev->lock for hci_conn_params lookups (CVE-2026-68390) | HOL Guard CVE

High · CVSS 8.8CVE-2026-68390

Bluetooth: hci_sync: hold hdev->lock for hci_conn_params lookups

Answer in brief

CVE-2026-68390 records a High severity (CVSS 8.8) vulnerability in Bluetooth: hci_sync: hold hdev->lock for hci_conn_params lookups. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 10, 2026Updated Aug 17, 2026Source checked Sep 24, 2026First seen by HOL Aug 10, 2026Material review Aug 17, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.8
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 8.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=c530569adc19b5f0c62955de41f067bad34e3fe0 <8d892bec1dd134761cabec6ba23fe315d0f20f98 \|\| >=c530569adc19b5f0c62955de41f067bad34e3fe0 <c363202ec841df36421ec280eea3d5f94f556143	8d892bec1dd134761cabec6ba23fe315d0f20f98, c363202ec841df36421ec280eea3d5f94f556143
Linux/Linuxgeneric	6.19	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 8d892bec1dd134761cabec6ba23fe315d0f20f98 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 10, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 10, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: hold hdev->lock for hci_conn_params lookups hci_conn_params_lookup requires hdev->lock be held, otherwise the list iteration or param access is not safe. Hold hdev->lock for params lookups in hci_sync.

Quoted source text, attributed separately from HOL analysis.