CVE-2026-90253

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: MGMT: free the mesh send cancel command when it is cancelled

mesh_send_cancel() queues the pending command with a NULL destroy

callback, so it is only freed if send_cancel() runs. A cancelled entry is

leaked, as _hci_cmd_sync_cancel_entry() does not release entry->data when

there is no destroy callback, and hci_cmd_sync_clear() cancels every

pending entry when the controller is unregistered. Nothing else reclaims

it either: mgmt_pending_new() does not put the command on

hdev->mgmt_pending.

The leak also pins the socket reference taken by mgmt_pending_new(), so

the mgmt socket is never released.

Free the command from a destroy callback.

/// 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