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CVE-2022-49454: PCI: mediatek: Fix refcount leak in mtk_pcie_subsys_powerup()

• 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: PCI: mediatek: Fix refcount leak in mtk_pcie_subsys_powerup() The of_find_compatible_node() function returns a node pointer with refcount incremented, We should use of_node_put() on it when done Add the missing of_node_put() to release the refcount.

Affected products

• Linux kernel: from 5.15 before 5.15.46; from 5.16 before 5.17.14; from 5.18 before 5.18.3 — fixed in 5.15.46, 5.17.14, 5.18.3

How to fix

Upgrade to a fixed version: Linux kernel 5.15.46, 5.17.14, 5.18.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/09b2d906d78ddf5042b1f3e0091835fc6997e8a4
• https://git.kernel.org/stable/c/214e0d8fe4a813ae6ffd62bc2dfe7544c20914f4
• https://git.kernel.org/stable/c/4cef4237d6c37257cb6ddc397723e9c0dded0efe
• https://git.kernel.org/stable/c/ad1c9d13e04509ae24fae8dd2897148657323519

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