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CVE-2022-50033: usb: host: ohci-ppc-of: Fix refcount leak bug

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-06-18 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: usb: host: ohci-ppc-of: Fix refcount leak bug In ohci_hcd_ppc_of_probe(), of_find_compatible_node() will return a node pointer with refcount incremented. We should use of_node_put() when it is not used anymore.

Affected products

• Linux kernel: from 2.6.29 before 4.9.326; from 4.10 before 4.14.291; from 4.15 before 4.19.256; from 4.20 before 5.4.211; from 5.5 before 5.10.138; from 5.11 before 5.15.63 — fixed in 4.14.291, 4.19.256, 4.9.326, 5.10.138, 5.15.63, 5.19.4

How to fix

Upgrade to a fixed version: Linux kernel 4.14.291, 4.19.256, 4.9.326, 5.10.138. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0334d23c56ecf1ee1563bb83e29cc5a51ed7fb4e
• https://git.kernel.org/stable/c/0fc62bbc95319bbd330e3645afc7c286acec9ef8
• https://git.kernel.org/stable/c/403132881e66db7aa98b55c6655daedd80d407fd
• https://git.kernel.org/stable/c/40a959d7042bb7711e404ad2318b30e9f92c6b9b
• https://git.kernel.org/stable/c/c5c5bd5cdcc6dc9f75f53d1c89af463d39a2bb96
• https://git.kernel.org/stable/c/cb5dd65e889163e723df1c2f02288cc527a57785
• https://git.kernel.org/stable/c/ec583e300aee9f152a64911445092d18e1c36729
• https://git.kernel.org/stable/c/fe6fe64403710287f0ae61a516954d8a4f7c9e3f

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