# CVE-2022-49367: net: dsa: mv88e6xxx: Fix refcount leak in mv88e6xxx\_mdios\_register

- Severity: CVSS 5.5 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-02-26 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 4.11

## Description

In the Linux kernel, the following vulnerability has been resolved: net: dsa: mv88e6xxx: Fix refcount leak in mv88e6xxx_mdios_register of_get_child_by_name() returns a node pointer with refcount incremented, we should use of_node_put() on it when done. mv88e6xxx_mdio_register() pass the device node to of_mdiobus_register(). We don't need the device node after it. Add missing of_node_put() to avoid refcount leak.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory per the references below.
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## 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/dc1cf8c6f9793546696fded437a5b4c84944c48b
- https://git.kernel.org/stable/c/86c3c5f8e4bd1325e24f6fba9017cade29933377
- https://git.kernel.org/stable/c/a101793994c0a14c70bb4e44c7fda597eeebba0a
- https://git.kernel.org/stable/c/42658e47f1abbbe592007d3ba303de466114d0bb
- https://git.kernel.org/stable/c/c1df9cb756e5a9ba1841648c44ee5d92306b9c65
- https://git.kernel.org/stable/c/e0d763d0c7665c7897e4f5a0847ab0c82543345f
- https://git.kernel.org/stable/c/8a1a1255152da4fb934290e7ababc66f24985520
- https://git.kernel.org/stable/c/02ded5a173619b11728b8bf75a3fd995a2c1ff28

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Page: https://cve.now/CVE-2022-49367
JSON: https://cve.now/api/v1/entries/CVE-2022-49367
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