Bug 2513158 (CVE-2026-68390)

Summary: CVE-2026-68390 kernel: Bluetooth: hci_sync: hold hdev->lock for hci_conn_params lookups
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in the Linux kernel's Bluetooth subsystem, specifically within the `hci_sync` component. This vulnerability occurs because the `hci_conn_params_lookup` function does not properly hold a necessary lock (`hdev->lock`) during operations. This oversight can lead to unsafe list iterations or parameter access, potentially resulting in data corruption or system instability.
 Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-08-10 12:22:26 UTC 
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.
Comment 1 gkamathe 2026-08-11 13:36:58 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081046-CVE-2026-68390-f0ca@gregkh/T