CVE-2024-53075 riscv: Prevent a bad reference count on CPU nodes

What is CVE-2024-53075?

CVE-2024-53075 is a medium-severity vulnerability in Linux kernel, published on 19 Nov 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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.

Which versions are affected by CVE-2024-53075?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-53075?

Apply the vendor's patch.

Is CVE-2024-53075 being exploited?

There is no known exploitation of CVE-2024-53075 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BELL-CVE-2024-53075, DEBIAN-CVE-2024-53075, GHSA-7866-w9g3-g699, UBUNTU-CVE-2024-53075.