# CVE-2024-53075: linux: In the Linux kernel, the following vulnerability has been resolved:  riscv: Prevent a bad reference count on CPU node...

CVE-2024-53075 is fixed in linux on 1 platform, first by DEBIAN-CVE-2024-53075, released November 19, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2024-53075
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0022
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Nov 19, 2024

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.11.7-1 | [DEBIAN-CVE-2024-53075](https://patchblox.com/security/data/fix/linux/debian-cve-2024-53075.md) | Nov 19, 2024 |
| Linux | linux Debian 14 | 6.11.7-1 | [DEBIAN-CVE-2024-53075](https://patchblox.com/security/data/fix/linux/debian-cve-2024-53075.md) | Nov 19, 2024 |

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