Linux Kernel up to 5.16.14 ethtool of_find_compatible_node reference count

Summaryinfo

A vulnerability labeled as critical has been found in Linux Kernel up to 4.19.234/5.4.184/5.10.105/5.15.28/5.16.14. This issue affects the function of_find_compatible_node of the component ethtool. The manipulation results in reference count. This vulnerability was named CVE-2022-48856. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel up to 4.19.234/5.4.184/5.10.105/5.15.28/5.16.14. Affected is the function of_find_compatible_node of the component ethtool. 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: gianfar: ethtool: Fix refcount leak in gfar_get_ts_info 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.

The advisory is available at git.kernel.org. This vulnerability is traded as CVE-2022-48856 since 07/16/2024. Technical details are known, but there is no available exploit.

Upgrading to version 4.19.235, 5.4.185, 5.10.106, 5.15.29 or 5.16.15 eliminates this vulnerability. Applying the patch 6263f2eb93a8/f7b3b5203491/21044e679ed5/f49f646f9ec2/0e1b9a2078e0/2ac5b58e645c 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

• 4.19.234
• 5.4.184
• 5.10.105
• 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
• 5.16.0
• 5.16.1
• 5.16.2
• 5.16.3
• 5.16.4
• 5.16.5
• 5.16.6
• 5.16.7
• 5.16.8
• 5.16.9
• 5.16.10
• 5.16.11
• 5.16.12
• 5.16.13
• 5.16.14

License

• open-source

Website

• Vendor: https://www.kernel.org/

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