CVE-2022-49342: net: ethernet: bgmac: Fix refcount leak in bcma_mdio_mii_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: ethernet: bgmac: Fix refcount leak in bcma_mdio_mii_register of_get_child_by_name() returns a node pointer with refcount incremented, we should use of_node_put() on it when not need anymore. Add missing of_node_put() to avoid refcount leak.

Affected products

Linux kernel: from 4.8 before 5.17.15; from 5.18 before 5.18.4; 5.19-rc1 — fixed in 5.17.15, 5.18.4

How to fix

Upgrade to a fixed version: Linux kernel 5.17.15, 5.18.4. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/7fb1fe7d9a167205413f1de8db9f7d0f82c78286
https://git.kernel.org/stable/c/b51996e35bbfcc7a27d94dfeed5cc2429b2c0df4
https://git.kernel.org/stable/c/b8d91399775c55162073bb2aca061ec42e3d4bc1

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