What’s Vulnerable › Vulnerabilities

CVE-2022-49367: net: dsa: mv88e6xxx: Fix refcount leak in mv88e6xxx_mdios_register

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-02-26 · updated 2026-06-17

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.

Affected products

• Linux kernel: from 4.11 before 4.14.283; from 4.15 before 4.19.247; from 4.20 before 5.4.198; from 5.5 before 5.10.122; from 5.11 before 5.15.47; from 5.16 before 5.17.15 — fixed in 4.14.283, 4.19.247, 5.10.122, 5.15.47, 5.17.15, 5.18.4

How to fix

Upgrade to a fixed version: Linux kernel 4.14.283, 4.19.247, 5.10.122, 5.15.47. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/02ded5a173619b11728b8bf75a3fd995a2c1ff28
• https://git.kernel.org/stable/c/42658e47f1abbbe592007d3ba303de466114d0bb
• https://git.kernel.org/stable/c/86c3c5f8e4bd1325e24f6fba9017cade29933377
• https://git.kernel.org/stable/c/8a1a1255152da4fb934290e7ababc66f24985520
• https://git.kernel.org/stable/c/a101793994c0a14c70bb4e44c7fda597eeebba0a
• https://git.kernel.org/stable/c/c1df9cb756e5a9ba1841648c44ee5d92306b9c65
• https://git.kernel.org/stable/c/dc1cf8c6f9793546696fded437a5b4c84944c48b
• https://git.kernel.org/stable/c/e0d763d0c7665c7897e4f5a0847ab0c82543345f

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