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CVE-2022-49351: net: altera: Fix refcount leak in altera_tse_mdio_create

• 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: altera: Fix refcount leak in altera_tse_mdio_create Every iteration of for_each_child_of_node() decrements the reference count of the previous node. When break from a for_each_child_of_node() loop, we need to explicitly call of_node_put() on the child node when not need anymore. Add missing of_node_put() to avoid refcount leak.

Affected products

• Linux kernel: from 3.15 before 4.9.318; from 4.10 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 — fixed in 4.14.283, 4.19.247, 4.9.318, 5.10.122, 5.15.47, 5.17.15

How to fix

Upgrade to a fixed version: Linux kernel 4.14.283, 4.19.247, 4.9.318, 5.10.122. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/11ec18b1d8d92b9df307d31950dcba0b3dd7283c
• https://git.kernel.org/stable/c/1fd12298a0e0ca23478c715e672ee64c85670584
• https://git.kernel.org/stable/c/4f850fe0a32c3f1e19b76996a3b1ca32637a14de
• https://git.kernel.org/stable/c/5cd0e22fa11f4a21a8c09cc258f20b1474c95801
• https://git.kernel.org/stable/c/803b217f1fb49a2dbb2123acdb45111b9c48b8be
• https://git.kernel.org/stable/c/8174acbef87b8dd8bf3731eba2a5af1ac857e239
• https://git.kernel.org/stable/c/96bf5ed057df2d157274d4e2079002f9a9404bb8
• https://git.kernel.org/stable/c/a013fa884d8738ad8455aa1a843b8c9d80c6c833
• https://git.kernel.org/stable/c/e31d9ba169860687dba19bdc8fccbfd34077f655

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