CVE-2026-43212
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LoongArch Kernel cpumask_of_node() NUMA_NO_NODE Handling Flaw

Publication date: 2026-05-06

Last updated on: 2026-05-11

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: LoongArch: Make cpumask_of_node() robust against NUMA_NO_NODE The arch definition of cpumask_of_node() cannot handle NUMA_NO_NODE - which is a valid index - so add a check for this.
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Meta Information
Published
2026-05-06
Last Modified
2026-05-11
Generated
2026-06-16
AI Q&A
2026-05-06
EPSS Evaluated
2026-06-14
NVD
CVE-2026-43212
EUVD
EUVD-2026-27772
Affected Vendors & Products
Showing 5 associated CPEs
Vendor Product Version / Range
linux linux_kernel From 6.2 (inc) to 6.6.128 (exc)
linux linux_kernel From 6.7 (inc) to 6.12.75 (exc)
linux linux_kernel From 6.13 (inc) to 6.18.16 (exc)
linux linux_kernel From 6.19 (inc) to 6.19.6 (exc)
linux linux_kernel From 5.19 (inc) to 6.1.165 (exc)
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Exploitability
CWE
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability exists in the Linux kernel's LoongArch architecture implementation. The function cpumask_of_node() does not properly handle the special index NUMA_NO_NODE, which is a valid index representing no NUMA node. Because of this, the function can behave incorrectly when encountering NUMA_NO_NODE. The vulnerability was fixed by adding a check to handle NUMA_NO_NODE correctly.

Impact Analysis

This vulnerability relates to the Linux kernel's handling of the cpumask_of_node() function on the LoongArch architecture. Specifically, the function was not robust against the NUMA_NO_NODE value, which is a valid index. This could potentially lead to incorrect behavior or system instability when the kernel processes CPU masks for nodes.

The impact could include system crashes, unexpected behavior in CPU scheduling or resource allocation, or other reliability issues on affected systems using the LoongArch architecture.

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