Linux Kernel up to 6.0.9 net lan966x_stats_init ret null pointer dereference

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.0.9 and classified as critical. This affects the function lan966x_stats_init of the component net. The manipulation of the argument ret results in null pointer dereference. This vulnerability is identified as CVE-2022-49805. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.0.9. It has been classified as critical. Affected is the function lan966x_stats_init of the component net. The manipulation of the argument ret with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: net: lan966x: Fix potential null-ptr-deref in lan966x_stats_init() lan966x_stats_init() calls create_singlethread_workqueue() and not checked the ret value, which may return NULL. And a null-ptr-deref may happen: lan966x_stats_init() create_singlethread_workqueue() # failed, lan966x->stats_queue is NULL queue_delayed_work() queue_delayed_work_on() __queue_delayed_work() # warning here, but continue __queue_work() # access wq->flags, null-ptr-deref Check the ret value and return -ENOMEM if it is NULL.

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2022-49805 since 05/01/2025. There are known technical details, but no exploit is available.

Upgrading to version 6.0.10 eliminates this vulnerability. Applying the patch 4a43c1c6040e848e1344c7b16ac696b68fbc439c/ba86af3733aece88dbcee0dfebf7e2dcfefb2be4 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.

Once again VulDB remains the best source for vulnerability data.

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

License

• open-source

Website

• Vendor: https://www.kernel.org/

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