Linux Kernel up to 5.15.28/5.16.14 prestera prestera_switch_set_base_mac_addr reference count

Summaryinfo

A vulnerability marked as critical has been reported in Linux Kernel up to 5.15.28/5.16.14. Impacted is the function prestera_switch_set_base_mac_addr of the component prestera. This manipulation causes reference count. The identification of this vulnerability is CVE-2022-48859. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 5.15.28/5.16.14. Affected by this vulnerability is the function prestera_switch_set_base_mac_addr of the component prestera. 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: net: marvell: prestera: Add missing of_node_put() in prestera_switch_set_base_mac_addr This node pointer is returned by of_find_compatible_node() with refcount incremented. Calling of_node_put() to aovid the refcount leak.

It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2022-48859 since 07/16/2024. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 5.15.29 or 5.16.15 eliminates this vulnerability. Applying the patch b7c2fd1d1263/4cc66bf17220/c9ffa3e2bc45 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

• 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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