Linux Kernel up to 5.18.10 meson_smp_prepare_cpus of_find_compatible_node reference count

Summaryinfo

A vulnerability marked as problematic has been reported in Linux Kernel up to 4.19.251/5.4.204/5.10.129/5.15.53/5.18.10. The affected element is the function of_find_compatible_node of the component meson_smp_prepare_cpus. This manipulation causes reference count. The identification of this vulnerability is CVE-2022-49656. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 4.19.251/5.4.204/5.10.129/5.15.53/5.18.10. It has been declared as problematic. Affected by this vulnerability is the function of_find_compatible_node of the component meson_smp_prepare_cpus. The manipulation with an unknown input leads to a reference count vulnerability. The CWE definition for the vulnerability is CWE-911. The product uses a reference count to manage a resource, but it does not update or incorrectly updates the reference count. As an impact it is known to affect availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: ARM: meson: Fix refcount leak in meson_smp_prepare_cpus of_find_compatible_node() returns a node pointer with refcount incremented, we should use of_node_put() on it when done. Add missing of_node_put() to avoid refcount leak.

It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2022-49656 since 02/26/2025. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 4.19.252, 5.4.205, 5.10.130, 5.15.54 or 5.18.11 eliminates this vulnerability. Applying the patch 2e1bcd33478ef44e63a45457055060b5fe4118ad/3cf8ece9113242c10f83c7675ea4f4f67959ee43/3d90607e7e6afa89768b0aaa915b58bd2b849276/7208101ded1e9dcc52c8f0f8b16474211c871c1a/c5fbf4f74c94fd60d5e9bf9f7f8268c3601562ca/34d2cd3fccced12b958b8848e3eff0ee4296764c 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.

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Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 4.19.251
• 5.4.204
• 5.10.129
• 5.15.0
• 5.15.1
• 5.15.2
• 5.15.3
• 5.15.4
• 5.15.5
• 5.15.6
• 5.15.7
• 5.15.8
• 5.15.9
• 5.15.10
• 5.15.11
• 5.15.12
• 5.15.13
• 5.15.14
• 5.15.15
• 5.15.16
• 5.15.17
• 5.15.18
• 5.15.19
• 5.15.20
• 5.15.21
• 5.15.22
• 5.15.23
• 5.15.24
• 5.15.25
• 5.15.26
• 5.15.27
• 5.15.28
• 5.15.29
• 5.15.30
• 5.15.31
• 5.15.32
• 5.15.33
• 5.15.34
• 5.15.35
• 5.15.36
• 5.15.37
• 5.15.38
• 5.15.39
• 5.15.40
• 5.15.41
• 5.15.42
• 5.15.43
• 5.15.44
• 5.15.45
• 5.15.46
• 5.15.47
• 5.15.48
• 5.15.49
• 5.15.50
• 5.15.51
• 5.15.52
• 5.15.53
• 5.18.0
• 5.18.1
• 5.18.2
• 5.18.3
• 5.18.4
• 5.18.5
• 5.18.6
• 5.18.7
• 5.18.8
• 5.18.9
• 5.18.10

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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CPE 2.2info

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