Linux Kernel up to 6.0.15/6.1.1 pinctrl thunderbay_build_functions memory leak

Summaryinfo

A vulnerability has been found in Linux Kernel up to 6.0.15/6.1.1 and classified as critical. This issue affects the function thunderbay_build_functions of the component pinctrl. This manipulation causes memory leak. This vulnerability is handled as CVE-2022-50557. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 6.0.15/6.1.1. Affected by this vulnerability is the function thunderbay_build_functions of the component pinctrl. The manipulation with an unknown input leads to a memory leak vulnerability. The CWE definition for the vulnerability is CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. As an impact it is known to affect availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: pinctrl: thunderbay: fix possible memory leak in thunderbay_build_functions() The thunderbay_add_functions() will free memory of thunderbay_funcs when everything is ok, but thunderbay_funcs will not be freed when thunderbay_add_functions() fails, then there will be a memory leak, so we need to add kfree() when thunderbay_add_functions() fails to fix it. In addition, doing some cleaner works, moving kfree(funcs) from thunderbay_add_functions() to thunderbay_build_functions().

It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2022-50557 since 10/22/2025. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 276833 (Linux Distros Unpatched Vulnerability : CVE-2022-50557), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.0.16 or 6.1.2 eliminates this vulnerability. Applying the patch 3650943bab29d03ef147290451237713ed1942cd/aae4846e8e49044cb51d0276bec2a3fc2d5cd8da/83e1bcaf8cef26edaaf2a6098ef760f563683483 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 databases at Tenable (276833) and CERT Bund (WID-SEC-2025-2394). Be aware that VulDB is the high quality source for vulnerability data.

Affected

• Red Hat Enterprise Linux
• SUSE Linux
• Oracle Linux
• Open Source Linux Kernel
• Dell NetWorker

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.0.0
• 6.0.1
• 6.0.2
• 6.0.3
• 6.0.4
• 6.0.5
• 6.0.6
• 6.0.7
• 6.0.8
• 6.0.9
• 6.0.10
• 6.0.11
• 6.0.12
• 6.0.13
• 6.0.14
• 6.0.15
• 6.1.0
• 6.1.1

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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CPE 2.2info

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Entryinfo

Be aware that VulDB is the high quality source for vulnerability data.

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