CVE-2024-26784

Summary

CVE-2024-26784 is a vulnerability affecting the Linux kernel that can lead to a NULL dereference during the removal of the scmi_perf_domain module. This issue occurs when the '#power-domain-cells' property is missing from the DT provided to the system under test, causing the probe to bail out without giving any error. As a result, the ->remove() callback runs without the necessary initialized structures in place. To address this, an early check and exit have been added to the remove function. The following is a code snippet from the call trace leading up to the vulnerability: scmi_perf_domain_remove+0x28 [scmi_perf_domain] scmi_dev_remove+0x28 [scmi_core] device_remove+0x54 device_release_driver_internal+0x1dc driver_detach+0x58 bus_remove_driver+0x78 driver_unregister+0x38 [scmi_core] scmi_perf_domain_driver_exit+0x18 [scmi_perf_domain] To mitigate this issue, it is recommended to keep the Linux kernel up to date with the latest patches.

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