Bluetooth: MGMT: free the HCI command when it is cancelled (CVE-2026-90252) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-90252

Bluetooth: MGMT: free the HCI command when it is cancelled

Answer in brief

CVE-2026-90252 records a Unknown severity vulnerability in Bluetooth: MGMT: free the HCI command when it is cancelled. 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 Sep 17, 2026Updated Sep 17, 2026Source checked Sep 17, 2026First seen by HOL Sep 17, 2026Material review Sep 17, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. 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	>=827af4787e74e8df9e8e0677a69fbb15e0856d2f <e0cd7b34dc6b5414cac3d4cd376f73d3e9ffbd93 \|\| >=827af4787e74e8df9e8e0677a69fbb15e0856d2f <481533b03985177ddc805e0bd12fc07e7adf9040 \|\| >=827af4787e74e8df9e8e0677a69fbb15e0856d2f <414b365ecea6c30357adee6b8a7c5edc03a03575	e0cd7b34dc6b5414cac3d4cd376f73d3e9ffbd93, 481533b03985177ddc805e0bd12fc07e7adf9040, 414b365ecea6c30357adee6b8a7c5edc03a03575
Linux/Linuxgeneric	6.13	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to e0cd7b34dc6b5414cac3d4cd376f73d3e9ffbd93 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

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

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: MGMT: free the HCI command when it is cancelled mgmt_hci_cmd_sync() queues the pending command with a NULL destroy callback, so it is only freed if send_hci_cmd_sync() 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. The now-empty done label is replaced by a direct return.

Quoted source text, attributed separately from HOL analysis.