CVE-2024-53075: riscv: Prevent a bad reference count on CPU nodes
First published: Tue Nov 19 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=6.11<6.11.7 | |
| Linux Kernel | =6.12-rc1 | |
| Linux Kernel | =6.12-rc2 | |
| Linux Kernel | =6.12-rc3 | |
| Linux Kernel | =6.12-rc4 | |
| Linux Kernel | =6.12-rc5 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2024-53075?
CVE-2024-53075 has been classified with a moderate severity due to potential reference counting issues in the Linux kernel.
How do I fix CVE-2024-53075?
To fix CVE-2024-53075, update to a patched version of the Linux kernel, specifically 6.12-rc6 or later.
Which versions of the Linux kernel are affected by CVE-2024-53075?
CVE-2024-53075 affects Linux kernel versions from 6.11 to 6.12-rc5.
What is the nature of the vulnerability in CVE-2024-53075?
CVE-2024-53075 involves a bad reference count on CPU nodes when populating cache leaves in the Linux kernel.
Is CVE-2024-53075 specific to any hardware architecture?
CVE-2024-53075 is particularly relevant for systems utilizing the RISC-V architecture.
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