CVE-2024-53075
N/A
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | ebccacb0b599fa788a16eff35a7de14621f56804 < 80aec5a855106c668b5978c48e789f010198b832 | affected |
| Linux | Linux | 604f32ea6909b0ebb8ab0bf1ab7dc66ee3dc8955 < 303846a3dc275e35fbb556d72f1e356ba669e4f8 | affected |
| Linux | Linux | 604f32ea6909b0ebb8ab0bf1ab7dc66ee3dc8955 < 37233169a6ea912020c572f870075a63293b786a | affected |
| Linux | Linux | 6.11 | affected |
| Linux | Linux | 0 < 6.11 | unaffected |
| Linux | Linux | 6.11.7 <= 6.11.* | unaffected |
| Linux | Linux | 6.12 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/80aec5a855106c668b5978c48e789f010198b832
- https://git.kernel.org/stable/c/303846a3dc275e35fbb556d72f1e356ba669e4f8
- https://git.kernel.org/stable/c/37233169a6ea912020c572f870075a63293b786a
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