Linux Kernel up to 6.11.4 pinctrl device_for_each_child_node reference count

Summaryinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 6.11.4. Impacted is the function device_for_each_child_node of the component pinctrl. The manipulation results in reference count. This vulnerability is known as CVE-2024-50197. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 6.11.4. Affected is the function device_for_each_child_node of the component pinctrl. The manipulation with an unknown input leads to a reference count vulnerability. CWE is classifying the issue as CWE-911. The product uses a reference count to manage a resource, but it does not update or incorrectly updates the reference count. This is going to have an impact on availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: pinctrl: intel: platform: fix error path in device_for_each_child_node() The device_for_each_child_node() loop requires calls to fwnode_handle_put() upon early returns to decrement the refcount of the child node and avoid leaking memory if that error path is triggered. There is one early returns within that loop in intel_platform_pinctrl_prepare_community(), but fwnode_handle_put() is missing. Instead of adding the missing call, the scoped version of the loop can be used to simplify the code and avoid mistakes in the future if new early returns are added, as the child node is only used for parsing, and it is never assigned.

The advisory is available at git.kernel.org. This vulnerability is traded as CVE-2024-50197 since 10/21/2024. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 216493 (Ubuntu 24.10 : Linux kernel vulnerabilities (USN-7276-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.11.5 eliminates this vulnerability. Applying the patch be3f7b9f995a/16a6d2e685e8 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (216493). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.11.0
• 6.11.1
• 6.11.2
• 6.11.3
• 6.11.4

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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