CVE-2024-53075

riscv: Prevent a bad reference count on CPU nodes

Description

In the Linux kernel, the following vulnerability has been resolved: riscv: Prevent a bad reference count on CPU nodes When populating cache leaves we previously fetched the CPU device node at the very beginning. But when ACPI is enabled we go through a specific branch which returns early and does not call 'of_node_put' for the node that was acquired. Since we are not using a CPU device node for the ACPI code anyways, we can simply move the initialization of it just passed the ACPI block, and we are guaranteed to have an 'of_node_put' call for the acquired node. This prevents a bad reference count of the CPU device node. Moreover, the previous function did not check for errors when acquiring the device node, so a return -ENOENT has been added for that case.

5.5

CVSS

Severity: Medium

CVSS 3.1 •

EPSS 0.03%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/80aec5a855106c668b5978c48e789f010198b832
https://git.kernel.org/stable/c/303846a3dc275e35fbb556d72f1e356ba669e4f8	patch
https://git.kernel.org/stable/c/37233169a6ea912020c572f870075a63293b786a	patch

Frequently Asked Questions

What is the severity of CVE-2024-53075?: CVE-2024-53075 has been scored as a medium severity vulnerability.
How to fix CVE-2024-53075?: To fix CVE-2024-53075, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2024-53075 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2024-53075 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-53075?: CVE-2024-53075 affects Linux Linux, Linux Linux.

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